cabal install: mmorph dependency hell?

cabal install: mmorph dependency hell?

[Ben Bolker]

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I  have pandoc 1.11.1 installed via cabal on Ubuntu 12.04, trying to update 
(I really want the "pause" functionality for slide shows).

I'm having trouble with the 'mmorph' dependency, which is reported to fail 
when I 'cabal install pandoc' (after 'cabal update').   If I 'cabal install 
mmorph' it tells me it's already installed. If I 'cabal install mmorph 
--reinstall' it appears to install correctly (see below), but 'cabal 
install pandoc' still fails.

I only use cabal/haskell for pandoc, so I'm pretty clueless -- any help 
would be greatly appreciated.

Two possible clues:

1. in the output below I see both

     (mmorph reinstall): mmorph-1.0.1 (reinstall) changes: 
transformers-0.3.0.0 -> 0.2.2.0

and

   (failed mmorph install): 
    Could not find module `Control.Applicative.Backwards'
    [...]
    It is a member of the hidden package `transformers-0.3.0.0'.

Is there a dependency mismatch here somewhere?

2. I see from https://github.com/Gabriel439/Haskell-MMorph-Library that 
mmorph 1.0.1 was only released 5 days ago, so maybe I'm among the first to 
stumble on a new problem?

  sincerely
    Ben Bolker



$ cabal install pandoc
Resolving dependencies...
In order, the following will be installed:
mmorph-1.0.1 (reinstall) changes: transformers-0.3.0.0 -> 0.2.2.0
resourcet-0.4.10 (new package)
conduit-1.0.9.3 (new package)
blaze-builder-conduit-1.0.0 (new package)
yaml-0.8.5.2 (new package)
zlib-conduit-1.0.0 (new package)
http-conduit-1.9.6 (new package)
pandoc-1.12.2.1 (new package)
Warning: Note that reinstalls are always dangerous. Continuing anyway...
Configuring mmorph-1.0.1...
Building mmorph-1.0.1...
Preprocessing library mmorph-1.0.1...

src/Control/Monad/Morph.hs:76:8:
    Could not find module `Control.Applicative.Backwards'
    It is a member of the hidden package `applicative-extras-0.1.8'.
    Perhaps you need to add `applicative-extras' to the build-depends in 
your .cabal file.
    It is a member of the hidden package `transformers-0.3.0.0'.
    Perhaps you need to add `transformers' to the build-depends in your 
.cabal file.
    Use -v to see a list of the files searched for.
cabal: Error: some packages failed to install:
blaze-builder-conduit-1.0.0 depends on mmorph-1.0.1 which failed to install.
conduit-1.0.9.3 depends on mmorph-1.0.1 which failed to install.
http-conduit-1.9.6 depends on mmorph-1.0.1 which failed to install.
mmorph-1.0.1 failed during the building phase. The exception was:
ExitFailure 1
pandoc-1.12.2.1 depends on mmorph-1.0.1 which failed to install.
resourcet-0.4.10 depends on mmorph-1.0.1 which failed to install.
yaml-0.8.5.2 depends on mmorph-1.0.1 which failed to install.
zlib-conduit-1.0.0 depends on mmorph-1.0.1 which failed to install.


 cabal install mmorph --reinstall
Resolving dependencies...
In order, the following will be installed:
mmorph-1.0.1 (reinstall)
Warning: Note that reinstalls are always dangerous. Continuing anyway...
Configuring mmorph-1.0.1...
Building mmorph-1.0.1...
Preprocessing library mmorph-1.0.1...
[1 of 2] Compiling Control.Monad.Morph ( src/Control/Monad/Morph.hs, 
dist/build/Control/Monad/Morph.o )
[2 of 2] Compiling Control.Monad.Trans.Compose ( 
src/Control/Monad/Trans/Compose.hs, 
dist/build/Control/Monad/Trans/Compose.o )
Registering mmorph-1.0.1...
Installing library in /home/bolker/.cabal/lib/mmorph-1.0.1/ghc-7.4.1
Registering mmorph-1.0.1...


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Re: cabal install: mmorph dependency hell?

[kurt.pfeifle-gM/Ye1E23mwN+BqQ9rBEUg]

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All 'cabal install' operations place their executables into 
$HOME/.cabal/bin/

Hence you need to set your PATH to include this directory.

Try this, in a shell terminal window:

export PATH=$HOME/.cabal/bin:$PATH
cabal install pandoc


and see if it works then....


Am Sonntag, 5. Januar 2014 00:30:44 UTC+1 schrieb Ben Bolker:
>
> I  have pandoc 1.11.1 installed via cabal on Ubuntu 12.04, trying to 
> update (I really want the "pause" functionality for slide shows).
>
> I'm having trouble with the 'mmorph' dependency, which is reported to fail 
> when I 'cabal install pandoc' (after 'cabal update').   If I 'cabal install 
> mmorph' it tells me it's already installed. If I 'cabal install mmorph 
> --reinstall' it appears to install correctly (see below), but 'cabal 
> install pandoc' still fails.
>
> I only use cabal/haskell for pandoc, so I'm pretty clueless -- any help 
> would be greatly appreciated.
>
> Two possible clues:
>
> 1. in the output below I see both
>
>      (mmorph reinstall): mmorph-1.0.1 (reinstall) changes: 
> transformers-0.3.0.0 -> 0.2.2.0
>
> and
>
>    (failed mmorph install): 
>     Could not find module `Control.Applicative.Backwards'
>     [...]
>     It is a member of the hidden package `transformers-0.3.0.0'.
>
> Is there a dependency mismatch here somewhere?
>
> 2. I see from https://github.com/Gabriel439/Haskell-MMorph-Library that 
> mmorph 1.0.1 was only released 5 days ago, so maybe I'm among the first to 
> stumble on a new problem?
>
>   sincerely
>     Ben Bolker
>
>
>
> $ cabal install pandoc
> Resolving dependencies...
> In order, the following will be installed:
> mmorph-1.0.1 (reinstall) changes: transformers-0.3.0.0 -> 0.2.2.0
> resourcet-0.4.10 (new package)
> conduit-1.0.9.3 (new package)
> blaze-builder-conduit-1.0.0 (new package)
> yaml-0.8.5.2 (new package)
> zlib-conduit-1.0.0 (new package)
> http-conduit-1.9.6 (new package)
> pandoc-1.12.2.1 (new package)
> Warning: Note that reinstalls are always dangerous. Continuing anyway...
> Configuring mmorph-1.0.1...
> Building mmorph-1.0.1...
> Preprocessing library mmorph-1.0.1...
>
> src/Control/Monad/Morph.hs:76:8:
>     Could not find module `Control.Applicative.Backwards'
>     It is a member of the hidden package `applicative-extras-0.1.8'.
>     Perhaps you need to add `applicative-extras' to the build-depends in 
> your .cabal file.
>     It is a member of the hidden package `transformers-0.3.0.0'.
>     Perhaps you need to add `transformers' to the build-depends in your 
> .cabal file.
>     Use -v to see a list of the files searched for.
> cabal: Error: some packages failed to install:
> blaze-builder-conduit-1.0.0 depends on mmorph-1.0.1 which failed to 
> install.
> conduit-1.0.9.3 depends on mmorph-1.0.1 which failed to install.
> http-conduit-1.9.6 depends on mmorph-1.0.1 which failed to install.
> mmorph-1.0.1 failed during the building phase. The exception was:
> ExitFailure 1
> pandoc-1.12.2.1 depends on mmorph-1.0.1 which failed to install.
> resourcet-0.4.10 depends on mmorph-1.0.1 which failed to install.
> yaml-0.8.5.2 depends on mmorph-1.0.1 which failed to install.
> zlib-conduit-1.0.0 depends on mmorph-1.0.1 which failed to install.
>
>
>  cabal install mmorph --reinstall
> Resolving dependencies...
> In order, the following will be installed:
> mmorph-1.0.1 (reinstall)
> Warning: Note that reinstalls are always dangerous. Continuing anyway...
> Configuring mmorph-1.0.1...
> Building mmorph-1.0.1...
> Preprocessing library mmorph-1.0.1...
> [1 of 2] Compiling Control.Monad.Morph ( src/Control/Monad/Morph.hs, 
> dist/build/Control/Monad/Morph.o )
> [2 of 2] Compiling Control.Monad.Trans.Compose ( 
> src/Control/Monad/Trans/Compose.hs, 
> dist/build/Control/Monad/Trans/Compose.o )
> Registering mmorph-1.0.1...
> Installing library in /home/bolker/.cabal/lib/mmorph-1.0.1/ghc-7.4.1
> Registering mmorph-1.0.1...
>
>
>

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Re: cabal install: mmorph dependency hell?

[Ben Bolker]

On 14-01-04 07:06 PM, kurt.pfeifle-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org wrote:
> All 'cabal install' operations place their executables into
> $HOME/.cabal/bin/
> 
> Hence you need to set your PATH to include this directory.
> 
> Try this, in a shell terminal window:
> 
>     export PATH=$HOME/.cabal/bin:$PATH
>     cabal install pandoc
> 
> 
> and see if it works then....

  Thanks for quick reply.  Alas, I already had my PATH set ...

  Ben Bolker

> 
> 
> Am Sonntag, 5. Januar 2014 00:30:44 UTC+1 schrieb Ben Bolker:
> 
>     I  have pandoc 1.11.1 installed via cabal on Ubuntu 12.04, trying to
>     update (I really want the "pause" functionality for slide shows).
> 
>     I'm having trouble with the 'mmorph' dependency, which is reported
>     to fail when I 'cabal install pandoc' (after 'cabal update').   If I
>     'cabal install mmorph' it tells me it's already installed. If I
>     'cabal install mmorph --reinstall' it appears to install correctly
>     (see below), but 'cabal install pandoc' still fails.
> 
>     I only use cabal/haskell for pandoc, so I'm pretty clueless -- any
>     help would be greatly appreciated.
> 
>     Two possible clues:
> 
>     1. in the output below I see both
> 
>          (mmorph reinstall): mmorph-1.0.1 (reinstall) changes:
>     transformers-0.3.0.0 -> 0.2.2.0
> 
>     and
> 
>        (failed mmorph install):
>         Could not find module `Control.Applicative.Backwards'
>         [...]
>         It is a member of the hidden package `transformers-0.3.0.0'.
> 
>     Is there a dependency mismatch here somewhere?
> 
>     2. I see from https://github.com/Gabriel439/Haskell-MMorph-Library
>     <https://github.com/Gabriel439/Haskell-MMorph-Library> that mmorph
>     1.0.1 was only released 5 days ago, so maybe I'm among the first to
>     stumble on a new problem?
> 
>       sincerely
>         Ben Bolker
> 
> 
> 
>     $ cabal install pandoc
>     Resolving dependencies...
>     In order, the following will be installed:
>     mmorph-1.0.1 (reinstall) changes: transformers-0.3.0.0 -> 0.2.2.0
>     resourcet-0.4.10 (new package)
>     conduit-1.0.9.3 (new package)
>     blaze-builder-conduit-1.0.0 (new package)
>     yaml-0.8.5.2 (new package)
>     zlib-conduit-1.0.0 (new package)
>     http-conduit-1.9.6 (new package)
>     pandoc-1.12.2.1 (new package)
>     Warning: Note that reinstalls are always dangerous. Continuing anyway...
>     Configuring mmorph-1.0.1...
>     Building mmorph-1.0.1...
>     Preprocessing library mmorph-1.0.1...
> 
>     src/Control/Monad/Morph.hs:76:8:
>         Could not find module `Control.Applicative.Backwards'
>         It is a member of the hidden package `applicative-extras-0.1.8'.
>         Perhaps you need to add `applicative-extras' to the
>     build-depends in your .cabal file.
>         It is a member of the hidden package `transformers-0.3.0.0'.
>         Perhaps you need to add `transformers' to the build-depends in
>     your .cabal file.
>         Use -v to see a list of the files searched for.
>     cabal: Error: some packages failed to install:
>     blaze-builder-conduit-1.0.0 depends on mmorph-1.0.1 which failed to
>     install.
>     conduit-1.0.9.3 depends on mmorph-1.0.1 which failed to install.
>     http-conduit-1.9.6 depends on mmorph-1.0.1 which failed to install.
>     mmorph-1.0.1 failed during the building phase. The exception was:
>     ExitFailure 1
>     pandoc-1.12.2.1 depends on mmorph-1.0.1 which failed to install.
>     resourcet-0.4.10 depends on mmorph-1.0.1 which failed to install.
>     yaml-0.8.5.2 depends on mmorph-1.0.1 which failed to install.
>     zlib-conduit-1.0.0 depends on mmorph-1.0.1 which failed to install.
> 
> 
>      cabal install mmorph --reinstall
>     Resolving dependencies...
>     In order, the following will be installed:
>     mmorph-1.0.1 (reinstall)
>     Warning: Note that reinstalls are always dangerous. Continuing anyway...
>     Configuring mmorph-1.0.1...
>     Building mmorph-1.0.1...
>     Preprocessing library mmorph-1.0.1...
>     [1 of 2] Compiling Control.Monad.Morph ( src/Control/Monad/Morph.hs,
>     dist/build/Control/Monad/Morph.o )
>     [2 of 2] Compiling Control.Monad.Trans.Compose (
>     src/Control/Monad/Trans/Compose.hs,
>     dist/build/Control/Monad/Trans/Compose.o )
>     Registering mmorph-1.0.1...
>     Installing library in /home/bolker/.cabal/lib/mmorph-1.0.1/ghc-7.4.1
>     Registering mmorph-1.0.1...
> 
> 
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Re: cabal install: mmorph dependency hell?

[John MacFarlane]

Odd, it's trying to downgrade the version of transformers
that mmorph depends on.  I'm not sure why.  It could be that
one of the other packages it needs to install is incompatible
with the latest transformers (though I don't think that's the
case).  Or maybe one of the other pandoc dependencies that you
compiled earlier is linked against transformers-0.2.2.0.

Have you tried doing a 'cabal clean' before 'cabal install --reinstall'?

+++ Ben Bolker [Jan 04 14 15:30 ]:
>    I  have pandoc 1.11.1 installed via cabal on Ubuntu 12.04, trying to
>    update (I really want the "pause" functionality for slide shows).
>    I'm having trouble with the 'mmorph' dependency, which is reported to
>    fail when I 'cabal install pandoc' (after 'cabal update').   If I
>    'cabal install mmorph' it tells me it's already installed. If I 'cabal
>    install mmorph --reinstall' it appears to install correctly (see
>    below), but 'cabal install pandoc' still fails.
>    I only use cabal/haskell for pandoc, so I'm pretty clueless -- any help
>    would be greatly appreciated.
>    Two possible clues:
>    1. in the output below I see both
>         (mmorph reinstall): mmorph-1.0.1 (reinstall) changes:
>    transformers-0.3.0.0 -> 0.2.2.0
>    and
>       (failed mmorph install):
>        Could not find module `Control.Applicative.Backwards'
>        [...]
>        It is a member of the hidden package `transformers-0.3.0.0'.
>    Is there a dependency mismatch here somewhere?
>    2. I see from https://github.com/Gabriel439/Haskell-MMorph-Library that
>    mmorph 1.0.1 was only released 5 days ago, so maybe I'm among the first
>    to stumble on a new problem?
>      sincerely
>        Ben Bolker
>    $ cabal install pandoc
>    Resolving dependencies...
>    In order, the following will be installed:
>    mmorph-1.0.1 (reinstall) changes: transformers-0.3.0.0 -> 0.2.2.0
>    resourcet-0.4.10 (new package)
>    conduit-1.0.9.3 (new package)
>    blaze-builder-conduit-1.0.0 (new package)
>    yaml-0.8.5.2 (new package)
>    zlib-conduit-1.0.0 (new package)
>    http-conduit-1.9.6 (new package)
>    pandoc-1.12.2.1 (new package)
>    Warning: Note that reinstalls are always dangerous. Continuing
>    anyway...
>    Configuring mmorph-1.0.1...
>    Building mmorph-1.0.1...
>    Preprocessing library mmorph-1.0.1...
>    src/Control/Monad/Morph.hs:76:8:
>        Could not find module `Control.Applicative.Backwards'
>        It is a member of the hidden package `applicative-extras-0.1.8'.
>        Perhaps you need to add `applicative-extras' to the build-depends
>    in your .cabal file.
>        It is a member of the hidden package `transformers-0.3.0.0'.
>        Perhaps you need to add `transformers' to the build-depends in your
>    .cabal file.
>        Use -v to see a list of the files searched for.
>    cabal: Error: some packages failed to install:
>    blaze-builder-conduit-1.0.0 depends on mmorph-1.0.1 which failed to
>    install.
>    conduit-1.0.9.3 depends on mmorph-1.0.1 which failed to install.
>    http-conduit-1.9.6 depends on mmorph-1.0.1 which failed to install.
>    mmorph-1.0.1 failed during the building phase. The exception was:
>    ExitFailure 1
>    pandoc-1.12.2.1 depends on mmorph-1.0.1 which failed to install.
>    resourcet-0.4.10 depends on mmorph-1.0.1 which failed to install.
>    yaml-0.8.5.2 depends on mmorph-1.0.1 which failed to install.
>    zlib-conduit-1.0.0 depends on mmorph-1.0.1 which failed to install.
>     cabal install mmorph --reinstall
>    Resolving dependencies...
>    In order, the following will be installed:
>    mmorph-1.0.1 (reinstall)
>    Warning: Note that reinstalls are always dangerous. Continuing
>    anyway...
>    Configuring mmorph-1.0.1...
>    Building mmorph-1.0.1...
>    Preprocessing library mmorph-1.0.1...
>    [1 of 2] Compiling Control.Monad.Morph ( src/Control/Monad/Morph.hs,
>    dist/build/Control/Monad/Morph.o )
>    [2 of 2] Compiling Control.Monad.Trans.Compose (
>    src/Control/Monad/Trans/Compose.hs,
>    dist/build/Control/Monad/Trans/Compose.o )
>    Registering mmorph-1.0.1...
>    Installing library in /home/bolker/.cabal/lib/mmorph-1.0.1/ghc-7.4.1
>    Registering mmorph-1.0.1...
> 
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Re: cabal install: mmorph dependency hell?

[Ben Bolker]

On 14-01-04 08:09 PM, John MacFarlane wrote:
> Odd, it's trying to downgrade the version of transformers
> that mmorph depends on.  I'm not sure why.  It could be that
> one of the other packages it needs to install is incompatible
> with the latest transformers (though I don't think that's the
> case).  Or maybe one of the other pandoc dependencies that you
> compiled earlier is linked against transformers-0.2.2.0.
> 
> Have you tried doing a 'cabal clean' before 'cabal install --reinstall'?

  If I just do a plain "cabal clean" in an arbitrary directory (e.g. my
home directory) I get "cabal: No cabal file found ..." I had downloaded
Haskell-MMorph-Library from git already (during previous attempts).  In
that directory, "cabal clean" apparently works.  So do "cabal install"
or "cabal install --reinstall", but when I run "cabal install pandoc" I
get the same issue -- it claims it needs to reinstall mmorph and
downgrade transformers:

mmorph-1.0.1 (reinstall) changes: transformers-0.3.0.0 -> 0.2.2.0

followed by the same errors as shown below.

I tried purging everything and starting over --

http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over

https://gist.github.com/simonmichael/1185421

 but still no luck (reports that mmorph-1.0.1 failed to install: the
precise error messages are too far back in my console history to see.  I
*could* run it all again and save the error log if anyone thought it
would be useful ...)

> 
> +++ Ben Bolker [Jan 04 14 15:30 ]:
>>    I  have pandoc 1.11.1 installed via cabal on Ubuntu 12.04, trying to
>>    update (I really want the "pause" functionality for slide shows).
>>    I'm having trouble with the 'mmorph' dependency, which is reported to
>>    fail when I 'cabal install pandoc' (after 'cabal update').   If I
>>    'cabal install mmorph' it tells me it's already installed. If I 'cabal
>>    install mmorph --reinstall' it appears to install correctly (see
>>    below), but 'cabal install pandoc' still fails.
>>    I only use cabal/haskell for pandoc, so I'm pretty clueless -- any help
>>    would be greatly appreciated.
>>    Two possible clues:
>>    1. in the output below I see both
>>         (mmorph reinstall): mmorph-1.0.1 (reinstall) changes:
>>    transformers-0.3.0.0 -> 0.2.2.0
>>    and
>>       (failed mmorph install):
>>        Could not find module `Control.Applicative.Backwards'
>>        [...]
>>        It is a member of the hidden package `transformers-0.3.0.0'.
>>    Is there a dependency mismatch here somewhere?
>>    2. I see from https://github.com/Gabriel439/Haskell-MMorph-Library that
>>    mmorph 1.0.1 was only released 5 days ago, so maybe I'm among the first
>>    to stumble on a new problem?
>>      sincerely
>>        Ben Bolker
>>    $ cabal install pandoc
>>    Resolving dependencies...
>>    In order, the following will be installed:
>>    mmorph-1.0.1 (reinstall) changes: transformers-0.3.0.0 -> 0.2.2.0
>>    resourcet-0.4.10 (new package)
>>    conduit-1.0.9.3 (new package)
>>    blaze-builder-conduit-1.0.0 (new package)
>>    yaml-0.8.5.2 (new package)
>>    zlib-conduit-1.0.0 (new package)
>>    http-conduit-1.9.6 (new package)
>>    pandoc-1.12.2.1 (new package)
>>    Warning: Note that reinstalls are always dangerous. Continuing
>>    anyway...
>>    Configuring mmorph-1.0.1...
>>    Building mmorph-1.0.1...
>>    Preprocessing library mmorph-1.0.1...
>>    src/Control/Monad/Morph.hs:76:8:
>>        Could not find module `Control.Applicative.Backwards'
>>        It is a member of the hidden package `applicative-extras-0.1.8'.
>>        Perhaps you need to add `applicative-extras' to the build-depends
>>    in your .cabal file.
>>        It is a member of the hidden package `transformers-0.3.0.0'.
>>        Perhaps you need to add `transformers' to the build-depends in your
>>    .cabal file.
>>        Use -v to see a list of the files searched for.
>>    cabal: Error: some packages failed to install:
>>    blaze-builder-conduit-1.0.0 depends on mmorph-1.0.1 which failed to
>>    install.
>>    conduit-1.0.9.3 depends on mmorph-1.0.1 which failed to install.
>>    http-conduit-1.9.6 depends on mmorph-1.0.1 which failed to install.
>>    mmorph-1.0.1 failed during the building phase. The exception was:
>>    ExitFailure 1
>>    pandoc-1.12.2.1 depends on mmorph-1.0.1 which failed to install.
>>    resourcet-0.4.10 depends on mmorph-1.0.1 which failed to install.
>>    yaml-0.8.5.2 depends on mmorph-1.0.1 which failed to install.
>>    zlib-conduit-1.0.0 depends on mmorph-1.0.1 which failed to install.
>>     cabal install mmorph --reinstall
>>    Resolving dependencies...
>>    In order, the following will be installed:
>>    mmorph-1.0.1 (reinstall)
>>    Warning: Note that reinstalls are always dangerous. Continuing
>>    anyway...
>>    Configuring mmorph-1.0.1...
>>    Building mmorph-1.0.1...
>>    Preprocessing library mmorph-1.0.1...
>>    [1 of 2] Compiling Control.Monad.Morph ( src/Control/Monad/Morph.hs,
>>    dist/build/Control/Monad/Morph.o )
>>    [2 of 2] Compiling Control.Monad.Trans.Compose (
>>    src/Control/Monad/Trans/Compose.hs,
>>    dist/build/Control/Monad/Trans/Compose.o )
>>    Registering mmorph-1.0.1...
>>    Installing library in /home/bolker/.cabal/lib/mmorph-1.0.1/ghc-7.4.1
>>    Registering mmorph-1.0.1...
>>
>>    --
>>    You received this message because you are subscribed to the Google
>>    Groups "pandoc-discuss" group.
>>    To unsubscribe from this group and stop receiving emails from it, send
>>    an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
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>>
>> References
>>
>>    1. https://groups.google.com/d/msgid/pandoc-discuss/4abea295-706b-4186-93e7-0dc10bbdacfe%40googlegroups.com
>>    2. https://groups.google.com/groups/opt_out
> 

Re: cabal install: mmorph dependency hell?

[John MacFarlane]

+++ Ben Bolker [Jan 04 14 21:37 ]:
> On 14-01-04 08:09 PM, John MacFarlane wrote:
> > Odd, it's trying to downgrade the version of transformers
> > that mmorph depends on.  I'm not sure why.  It could be that
> > one of the other packages it needs to install is incompatible
> > with the latest transformers (though I don't think that's the
> > case).  Or maybe one of the other pandoc dependencies that you
> > compiled earlier is linked against transformers-0.2.2.0.
> > 
> > Have you tried doing a 'cabal clean' before 'cabal install --reinstall'?
> 
>   If I just do a plain "cabal clean" in an arbitrary directory (e.g. my
> home directory) I get "cabal: No cabal file found ..."

Oh, I thought you were installing from the pandoc source directory,
not doing "cabal install pandoc."  So, never mind about the 'clean'.

> I tried purging everything and starting over --
> 
> http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over
> 
> https://gist.github.com/simonmichael/1185421
> 
>  but still no luck (reports that mmorph-1.0.1 failed to install: the
> precise error messages are too far back in my console history to see.  I
> *could* run it all again and save the error log if anyone thought it
> would be useful ...)

This is really strange.  I had no trouble on my debian box.  Go ahead
and send the full error log, maybe that will help.

Re: cabal install: mmorph dependency hell?

[Ben Bolker]

On 14-01-05 02:59 PM, John MacFarlane wrote:
> +++ Ben Bolker [Jan 04 14 21:37 ]:
>> On 14-01-04 08:09 PM, John MacFarlane wrote:
>>> Odd, it's trying to downgrade the version of transformers
>>> that mmorph depends on.  I'm not sure why.  It could be that
>>> one of the other packages it needs to install is incompatible
>>> with the latest transformers (though I don't think that's the
>>> case).  Or maybe one of the other pandoc dependencies that you
>>> compiled earlier is linked against transformers-0.2.2.0.
>>>
>>> Have you tried doing a 'cabal clean' before 'cabal install --reinstall'?
>>
>>   If I just do a plain "cabal clean" in an arbitrary directory (e.g. my
>> home directory) I get "cabal: No cabal file found ..."
> 
> Oh, I thought you were installing from the pandoc source directory,
> not doing "cabal install pandoc."  So, never mind about the 'clean'.
> 
>> I tried purging everything and starting over --
>>
>> http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over
>>
>> https://gist.github.com/simonmichael/1185421
>>
>>  but still no luck (reports that mmorph-1.0.1 failed to install: the
>> precise error messages are too far back in my console history to see.  I
>> *could* run it all again and save the error log if anyone thought it
>> would be useful ...)
> 
> This is really strange.  I had no trouble on my debian box.  Go ahead
> and send the full error log, maybe that will help.

  I purged, did 'cabal update', and then 'cabal install pandoc'.  Output
is posted at
http://ms.mcmaster.ca/~bolker/misc/pandoc_install_out.txt .

 Thank you for all help ...

  Ben Bolker

Re: cabal install: mmorph dependency hell?

[Josef Svenningsson]

[-- Attachment #1: Type: text/plain, Size: 3522 bytes --]

Hi,

I did some investigation and it seems that mmorph has gotten the dependency
constraints wrong for the transformers package. I've fixed the constraint
and submitted a pull request to the mmorph repository. Hopefully it should
be incorporated soon

https://github.com/Gabriel439/Haskell-MMorph-Library/pull/9

But right now you can try 'cabal install pandoc
--constraint=transformers==0.3.0.0' which forces the right version of the
transformers package. If you're lucky that's all that is needed.

HTH

Josef



On Sun, Jan 5, 2014 at 9:39 PM, Ben Bolker <bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> On 14-01-05 02:59 PM, John MacFarlane wrote:
> > +++ Ben Bolker [Jan 04 14 21:37 ]:
> >> On 14-01-04 08:09 PM, John MacFarlane wrote:
> >>> Odd, it's trying to downgrade the version of transformers
> >>> that mmorph depends on.  I'm not sure why.  It could be that
> >>> one of the other packages it needs to install is incompatible
> >>> with the latest transformers (though I don't think that's the
> >>> case).  Or maybe one of the other pandoc dependencies that you
> >>> compiled earlier is linked against transformers-0.2.2.0.
> >>>
> >>> Have you tried doing a 'cabal clean' before 'cabal install
> --reinstall'?
> >>
> >>   If I just do a plain "cabal clean" in an arbitrary directory (e.g. my
> >> home directory) I get "cabal: No cabal file found ..."
> >
> > Oh, I thought you were installing from the pandoc source directory,
> > not doing "cabal install pandoc."  So, never mind about the 'clean'.
> >
> >> I tried purging everything and starting over --
> >>
> >>
> http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over
> >>
> >> https://gist.github.com/simonmichael/1185421
> >>
> >>  but still no luck (reports that mmorph-1.0.1 failed to install: the
> >> precise error messages are too far back in my console history to see.  I
> >> *could* run it all again and save the error log if anyone thought it
> >> would be useful ...)
> >
> > This is really strange.  I had no trouble on my debian box.  Go ahead
> > and send the full error log, maybe that will help.
>
>   I purged, did 'cabal update', and then 'cabal install pandoc'.  Output
> is posted at
> http://ms.mcmaster.ca/~bolker/misc/pandoc_install_out.txt .
>
>  Thank you for all help ...
>
>   Ben Bolker
>
> --
> You received this message because you are subscribed to the Google Groups
> "pandoc-discuss" group.
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> For more options, visit https://groups.google.com/groups/opt_out.
>

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Re: cabal install: mmorph dependency hell?

[Ben Bolker]

On 14-01-05 04:58 PM, Josef Svenningsson wrote:
> Hi,
> 
> I did some investigation and it seems that mmorph has gotten the
> dependency constraints wrong for the transformers package. I've fixed
> the constraint and submitted a pull request to the mmorph repository.
> Hopefully it should be incorporated soon 
> 
> https://github.com/Gabriel439/Haskell-MMorph-Library/pull/9
> 
> But right now you can try 'cabal install pandoc
> --constraint=transformers==0.3.0.0' which forces the right version of
> the transformers package. If you're lucky that's all that is needed.
> 
> HTH
> 
> Josef

  This is fantastic.  Your solution is not working for me yet but it
gives me hope.  (I've managed to f*** my current pandoc installation by
nuking my .ghc/.cabal tree -- note to self, MOVE TO BACKUP LOCATION
rather than deleting!!!, so I'm now getting a little desperate ...)

  Ben Bolker

> 
> 
> 
> On Sun, Jan 5, 2014 at 9:39 PM, Ben Bolker <bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> <mailto:bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>> wrote:
> 
>     On 14-01-05 02:59 PM, John MacFarlane wrote:
>     > +++ Ben Bolker [Jan 04 14 21:37 ]:
>     >> On 14-01-04 08:09 PM, John MacFarlane wrote:
>     >>> Odd, it's trying to downgrade the version of transformers
>     >>> that mmorph depends on.  I'm not sure why.  It could be that
>     >>> one of the other packages it needs to install is incompatible
>     >>> with the latest transformers (though I don't think that's the
>     >>> case).  Or maybe one of the other pandoc dependencies that you
>     >>> compiled earlier is linked against transformers-0.2.2.0.
>     >>>
>     >>> Have you tried doing a 'cabal clean' before 'cabal install
>     --reinstall'?
>     >>
>     >>   If I just do a plain "cabal clean" in an arbitrary directory
>     (e.g. my
>     >> home directory) I get "cabal: No cabal file found ..."
>     >
>     > Oh, I thought you were installing from the pandoc source directory,
>     > not doing "cabal install pandoc."  So, never mind about the 'clean'.
>     >
>     >> I tried purging everything and starting over --
>     >>
>     >>
>     http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over
>     >>
>     >> https://gist.github.com/simonmichael/1185421
>     >>
>     >>  but still no luck (reports that mmorph-1.0.1 failed to install: the
>     >> precise error messages are too far back in my console history to
>     see.  I
>     >> *could* run it all again and save the error log if anyone thought it
>     >> would be useful ...)
>     >
>     > This is really strange.  I had no trouble on my debian box.  Go ahead
>     > and send the full error log, maybe that will help.
> 
>       I purged, did 'cabal update', and then 'cabal install pandoc'.  Output
>     is posted at
>     http://ms.mcmaster.ca/~bolker/misc/pandoc_install_out.txt .
> 
>      Thank you for all help ...
> 
>       Ben Bolker
> 
>     --
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>     Groups "pandoc-discuss" group.
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> 
> 
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Re: cabal install: mmorph dependency hell?

[Ben Bolker]

[-- Attachment #1: Type: text/plain, Size: 6563 bytes --]



On Sunday, January 5, 2014 5:04:06 PM UTC-5, Ben Bolker wrote:
>
> On 14-01-05 04:58 PM, Josef Svenningsson wrote: 
> > Hi, 
> > 
> > I did some investigation and it seems that mmorph has gotten the 
> > dependency constraints wrong for the transformers package. I've fixed 
> > the constraint and submitted a pull request to the mmorph repository. 
> > Hopefully it should be incorporated soon 
> > 
> > https://github.com/Gabriel439/Haskell-MMorph-Library/pull/9 
> > 
> > But right now you can try 'cabal install pandoc 
> > --constraint=transformers==0.3.0.0' which forces the right version of 
> > the transformers package. If you're lucky that's all that is needed. 
> > 
> > HTH 
> > 
> > Josef 
>
>   This is fantastic.  Your solution is not working for me yet but it 
> gives me hope.  (I've managed to f*** my current pandoc installation by 
> nuking my .ghc/.cabal tree -- note to self, MOVE TO BACKUP LOCATION 
> rather than deleting!!!, so I'm now getting a little desperate ...) 
>
>   Ben Bolker 
>
> > 
> > 
> > 
> > On Sun, Jan 5, 2014 at 9:39 PM, Ben Bolker <bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org 
> > <mailto:bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>> wrote: 
> > 
> >     On 14-01-05 02:59 PM, John MacFarlane wrote: 
> >     > +++ Ben Bolker [Jan 04 14 21:37 ]: 
> >     >> On 14-01-04 08:09 PM, John MacFarlane wrote: 
> >     >>> Odd, it's trying to downgrade the version of transformers 
> >     >>> that mmorph depends on.  I'm not sure why.  It could be that 
> >     >>> one of the other packages it needs to install is incompatible 
> >     >>> with the latest transformers (though I don't think that's the 
> >     >>> case).  Or maybe one of the other pandoc dependencies that you 
> >     >>> compiled earlier is linked against transformers-0.2.2.0. 
> >     >>> 
> >     >>> Have you tried doing a 'cabal clean' before 'cabal install 
> >     --reinstall'? 
> >     >> 
> >     >>   If I just do a plain "cabal clean" in an arbitrary directory 
> >     (e.g. my 
> >     >> home directory) I get "cabal: No cabal file found ..." 
> >     > 
> >     > Oh, I thought you were installing from the pandoc source 
> directory, 
> >     > not doing "cabal install pandoc."  So, never mind about the 
> 'clean'. 
> >     > 
> >     >> I tried purging everything and starting over -- 
> >     >> 
> >     >> 
> >     
> http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over 
> >     >> 
> >     >> https://gist.github.com/simonmichael/1185421 
> >     >> 
> >     >>  but still no luck (reports that mmorph-1.0.1 failed to install: 
> the 
> >     >> precise error messages are too far back in my console history to 
> >     see.  I 
> >     >> *could* run it all again and save the error log if anyone thought 
> it 
> >     >> would be useful ...) 
> >     > 
> >     > This is really strange.  I had no trouble on my debian box.  Go 
> ahead 
> >     > and send the full error log, maybe that will help. 
> > 
> >       I purged, did 'cabal update', and then 'cabal install pandoc'. 
>  Output 
> >     is posted at 
> >     http://ms.mcmaster.ca/~bolker/misc/pandoc_install_out.txt . 
> > 
> >      Thank you for all help ... 
> > 
> >       Ben Bolker 
> > 
> >     -- 
> >     You received this message because you are subscribed to the Google 
> >     Groups "pandoc-discuss" group. 
> >     To unsubscribe from this group and stop receiving emails from it, 
> >     send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org 
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> >     To post to this group, send email to pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org 
> >     <mailto:pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>. 
> >     To view this discussion on the web visit 
> >     
> https://groups.google.com/d/msgid/pandoc-discuss/52C9C2E5.805%40gmail.com. 
>
> >     For more options, visit https://groups.google.com/groups/opt_out. 
> > 
> > 
> > -- 
> > You received this message because you are subscribed to a topic in the 
> > Google Groups "pandoc-discuss" group. 
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>
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>
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>

Still failing.  Any ideas ... ????

 cabal install pandoc --reinstall --force-reinstalls 
--constraint=transformers==0.3.0.0
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: pandoc-1.12.2.1 (user goal)
trying: pandoc-1.12.2.1:+http-conduit
next goal: http-conduit (dependency of pandoc-1.12.2.1:+http-conduit)
rejecting: http-conduit-2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0.0 (conflict:
pandoc-1.12.2.1:http-conduit => http-conduit>=1.9 && <1.10)
trying: http-conduit-1.9.6
trying: regex-compat-0.95.1/installed-cee... (dependency of
http-conduit-1.9.6)
trying: regex-base-0.93.2/installed-f73... (dependency of
regex-compat-0.95.1/installed-cee...)
trying: transformers-base-0.4.1/installed-d27... (dependency of
http-conduit-1.9.6)
next goal: mtl (dependency of pandoc-1.12.2.1)
rejecting: mtl-2.0.1.0/installed-e35... (conflict: transformers-base =>
transformers==0.3.0.0/installed-f23..., mtl =>
transformers==0.2.2.0/installed-815...)
rejecting: mtl-2.1.2, 2.1.1, 2.1, 2.0.1.0, 2.0.0.0, 1.1.1.1, 1.1.1.0, 
1.1.0.2,
1.1.0.1, 1.1.0.0, 1.0 (conflict: regex-base => 
mtl==2.0.1.0/installed-e35...)
Backjump limit reached (change with --max-backjumps).
 

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Re: cabal install: mmorph dependency hell?

[Ben Bolker]

[-- Attachment #1: Type: text/plain, Size: 7880 bytes --]



On Sunday, January 5, 2014 5:28:28 PM UTC-5, Ben Bolker wrote:
>
>
>
> On Sunday, January 5, 2014 5:04:06 PM UTC-5, Ben Bolker wrote:
>>
>> On 14-01-05 04:58 PM, Josef Svenningsson wrote: 
>> > Hi, 
>> > 
>> > I did some investigation and it seems that mmorph has gotten the 
>> > dependency constraints wrong for the transformers package. I've fixed 
>> > the constraint and submitted a pull request to the mmorph repository. 
>> > Hopefully it should be incorporated soon 
>> > 
>> > https://github.com/Gabriel439/Haskell-MMorph-Library/pull/9 
>> > 
>> > But right now you can try 'cabal install pandoc 
>> > --constraint=transformers==0.3.0.0' which forces the right version of 
>> > the transformers package. If you're lucky that's all that is needed. 
>> > 
>> > HTH 
>> > 
>> > Josef 
>>
>>   This is fantastic.  Your solution is not working for me yet but it 
>> gives me hope.  (I've managed to f*** my current pandoc installation by 
>> nuking my .ghc/.cabal tree -- note to self, MOVE TO BACKUP LOCATION 
>> rather than deleting!!!, so I'm now getting a little desperate ...) 
>>
>>   Ben Bolker 
>>
>> > 
>> > 
>> > 
>> > On Sun, Jan 5, 2014 at 9:39 PM, Ben Bolker <bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org 
>> > <mailto:bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>> wrote: 
>> > 
>> >     On 14-01-05 02:59 PM, John MacFarlane wrote: 
>> >     > +++ Ben Bolker [Jan 04 14 21:37 ]: 
>> >     >> On 14-01-04 08:09 PM, John MacFarlane wrote: 
>> >     >>> Odd, it's trying to downgrade the version of transformers 
>> >     >>> that mmorph depends on.  I'm not sure why.  It could be that 
>> >     >>> one of the other packages it needs to install is incompatible 
>> >     >>> with the latest transformers (though I don't think that's the 
>> >     >>> case).  Or maybe one of the other pandoc dependencies that you 
>> >     >>> compiled earlier is linked against transformers-0.2.2.0. 
>> >     >>> 
>> >     >>> Have you tried doing a 'cabal clean' before 'cabal install 
>> >     --reinstall'? 
>> >     >> 
>> >     >>   If I just do a plain "cabal clean" in an arbitrary directory 
>> >     (e.g. my 
>> >     >> home directory) I get "cabal: No cabal file found ..." 
>> >     > 
>> >     > Oh, I thought you were installing from the pandoc source 
>> directory, 
>> >     > not doing "cabal install pandoc."  So, never mind about the 
>> 'clean'. 
>> >     > 
>> >     >> I tried purging everything and starting over -- 
>> >     >> 
>> >     >> 
>> >     
>> http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over 
>> >     >> 
>> >     >> https://gist.github.com/simonmichael/1185421 
>> >     >> 
>> >     >>  but still no luck (reports that mmorph-1.0.1 failed to install: 
>> the 
>> >     >> precise error messages are too far back in my console history to 
>> >     see.  I 
>> >     >> *could* run it all again and save the error log if anyone 
>> thought it 
>> >     >> would be useful ...) 
>> >     > 
>> >     > This is really strange.  I had no trouble on my debian box.  Go 
>> ahead 
>> >     > and send the full error log, maybe that will help. 
>> > 
>> >       I purged, did 'cabal update', and then 'cabal install pandoc'. 
>>  Output 
>> >     is posted at 
>> >     http://ms.mcmaster.ca/~bolker/misc/pandoc_install_out.txt . 
>> > 
>> >      Thank you for all help ... 
>> > 
>> >       Ben Bolker 
>> > 
>> >     -- 
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>> >     
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>>
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>>
>
> Still failing.  Any ideas ... ????
>
>  cabal install pandoc --reinstall --force-reinstalls 
> --constraint=transformers==0.3.0.0
> Resolving dependencies...
> cabal: Could not resolve dependencies:
> trying: pandoc-1.12.2.1 (user goal)
> trying: pandoc-1.12.2.1:+http-conduit
> next goal: http-conduit (dependency of pandoc-1.12.2.1:+http-conduit)
> rejecting: http-conduit-2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0.0 (conflict:
> pandoc-1.12.2.1:http-conduit => http-conduit>=1.9 && <1.10)
> trying: http-conduit-1.9.6
> trying: regex-compat-0.95.1/installed-cee... (dependency of
> http-conduit-1.9.6)
> trying: regex-base-0.93.2/installed-f73... (dependency of
> regex-compat-0.95.1/installed-cee...)
> trying: transformers-base-0.4.1/installed-d27... (dependency of
> http-conduit-1.9.6)
> next goal: mtl (dependency of pandoc-1.12.2.1)
> rejecting: mtl-2.0.1.0/installed-e35... (conflict: transformers-base =>
> transformers==0.3.0.0/installed-f23..., mtl =>
> transformers==0.2.2.0/installed-815...)
> rejecting: mtl-2.1.2, 2.1.1, 2.1, 2.0.1.0, 2.0.0.0, 1.1.1.1, 1.1.1.0, 
> 1.1.0.2,
> 1.1.0.1, 1.1.0.0, 1.0 (conflict: regex-base => mtl==
> 2.0.1.0/installed-e35...)
> Backjump limit reached (change with --max-backjumps).
>


 Finally got pandoc installed (phew), by using a bunch of probably 
unjustified brute force.

I tried cloning the forked version of mmorph, but that didn't seem to 
help.  Eventually I did:

 cabal install pandoc --reinstall --force-reinstalls 
--constraint=transformers==0.3.0.0 --max-backjumps=10000

which worked, but gave lots of dire warnings of the form

Configuring highlighting-kate-0.5.5.1...
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package regex-base-0.93.2 requires mtl-2.0.1.0
package parsec-3.1.4 requires mtl-2.1.2
package highlighting-kate-0.5.5.1 requires mtl-2.1.2
package mtl-2.0.1.0 requires transformers-0.2.2.0
package mtl-2.1.2 requires transformers-0.3.0.0
Building highlighting-kate-0.5.5.1...
Preprocessing library highlighting-kate-0.5.5.1...

   So -- I'm OK now but will hope this is a temporary and localized glitch, 
and doesn't hit anyone else or recur in the future.  (Looking forward to 
using the 'pause' functionality in slides!)

  

>  
>

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Re: cabal install: mmorph dependency hell?

[John MacFarlane]

Glad you got it to work.  Sorry you had so much trouble.  I'm not sure why:
these troubles -- 'cabal install pandoc' works very smoothly for me on debian.
One thing you might try is doing a sandboxed install:
http://coldwa.st/e/blog/2013-08-20-Cabal-sandbox.html

You'd need to get the pandoc source, and you'd probably need a more
recent cabal-install:

cabal install cabal-install

Another thought:  Look at your ~/.cabal/config.  Does it have
'user-install: False'?  (Or, are you cabal installing pandoc as root?)
If so, that is a bad idea.  On debian, I've found the best approach is
to install the haskell-platform using apt-get, then install everything
else in your user directory with cabal install.

Re: cabal install: mmorph dependency hell?

[Mario Marić]

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Hi to all!

I tried to install pandoc with:

cabal update
> cabal install pandoc


but also got this error at the end:

cabal: Error: some packages failed to install:
> conduit-1.0.10 depends on mmorph-1.0.1 which failed to install.
> http-client-conduit-0.2.0.1 depends on mmorph-1.0.1 which failed to 
> install.
> http-conduit-2.0.0.3 depends on mmorph-1.0.1 which failed to install.
> mmorph-1.0.1 failed during the building phase. The exception was:
> ExitFailure 1
> pandoc-1.12.3.1 depends on mmorph-1.0.1 which failed to install.
> resourcet-0.4.10 depends on mmorph-1.0.1 which failed to install.
> yaml-0.8.5.3 depends on mmorph-1.0.1 which failed to install.


Luckily I found this topic and tried: 'cabal install pandoc --reinstall 
--force-reinstalls --constraint=transformers==0.3.0.0' and everything went 
without error or warning at the end of the installation.

I done that on a fresh install of Ubuntu 12.04.3 LTS inside my home 
directory (not as a root) and with haskell-platform installed via apt-get.

It would be great to fix this so that 'cabal update && cabal install 
pandoc' is sufficient to install/update pandoc.

There is suggestion to change dependency at GitHub 
issue: https://github.com/Gabriel439/Haskell-MMorph-Library/pull/9

Thx John for this great tool, and Ben for ironing this issue out. :)

Cheers,
--
m.m

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Re: cabal install: mmorph dependency hell?

[Josef Svenningsson]

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Just to let everyone know that a new version of the mmorph package has been
released which fixes the problem we discovered here earlier. Hopefully this
will make pandoc easier to install.

http://hackage.haskell.org/package/mmorph-1.0.2

Josef


On Sun, Jan 5, 2014 at 10:58 PM, Josef Svenningsson <
josef.svenningsson-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> Hi,
>
> I did some investigation and it seems that mmorph has gotten the
> dependency constraints wrong for the transformers package. I've fixed the
> constraint and submitted a pull request to the mmorph repository. Hopefully
> it should be incorporated soon
>
> https://github.com/Gabriel439/Haskell-MMorph-Library/pull/9
>
> But right now you can try 'cabal install pandoc
> --constraint=transformers==0.3.0.0' which forces the right version of the
> transformers package. If you're lucky that's all that is needed.
>
> HTH
>
> Josef
>
>
>
> On Sun, Jan 5, 2014 at 9:39 PM, Ben Bolker <bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>> On 14-01-05 02:59 PM, John MacFarlane wrote:
>> > +++ Ben Bolker [Jan 04 14 21:37 ]:
>> >> On 14-01-04 08:09 PM, John MacFarlane wrote:
>> >>> Odd, it's trying to downgrade the version of transformers
>> >>> that mmorph depends on.  I'm not sure why.  It could be that
>> >>> one of the other packages it needs to install is incompatible
>> >>> with the latest transformers (though I don't think that's the
>> >>> case).  Or maybe one of the other pandoc dependencies that you
>> >>> compiled earlier is linked against transformers-0.2.2.0.
>> >>>
>> >>> Have you tried doing a 'cabal clean' before 'cabal install
>> --reinstall'?
>> >>
>> >>   If I just do a plain "cabal clean" in an arbitrary directory (e.g. my
>> >> home directory) I get "cabal: No cabal file found ..."
>> >
>> > Oh, I thought you were installing from the pandoc source directory,
>> > not doing "cabal install pandoc."  So, never mind about the 'clean'.
>> >
>> >> I tried purging everything and starting over --
>> >>
>> >>
>> http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over
>> >>
>> >> https://gist.github.com/simonmichael/1185421
>> >>
>> >>  but still no luck (reports that mmorph-1.0.1 failed to install: the
>> >> precise error messages are too far back in my console history to see.
>>  I
>> >> *could* run it all again and save the error log if anyone thought it
>> >> would be useful ...)
>> >
>> > This is really strange.  I had no trouble on my debian box.  Go ahead
>> > and send the full error log, maybe that will help.
>>
>>   I purged, did 'cabal update', and then 'cabal install pandoc'.  Output
>> is posted at
>> http://ms.mcmaster.ca/~bolker/misc/pandoc_install_out.txt .
>>
>>  Thank you for all help ...
>>
>>   Ben Bolker
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "pandoc-discuss" group.
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>> email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
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>> .
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>>
>
>

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