If I compare /usr/share/texmf-dist/web2c/texmfconf.lua with its counterpart
in Arch Linux, I found the differences in the following entries:

Gentoo:

> TEXMFSYSVAR     = "selfautoparent:texmf-var",
> TEXMFOS         = "selfautodir:",
> TEXMFDIST       = "selfautoparent:texmf-dist",
> TEXMFSYSCONFIG  = "selfautoparent:texmf-config",
>

Arch:

> TEXMFSYSVAR     = "/var/lib/texmf",
> TEXMFOS         = "selfautodir:share",
> TEXMFDIST       = "selfautodir:share/texmf-dist",
> TEXMFSYSCONFIG  = "/etc/texmf",
>

Changing the Gentoo file to its Arch equivalent fixes the issue after
running "mtxrun --generate". There may actually be a reason why this
configuration is different in Gentoo compared to Arch, but I haven't had
the time yet to look into it further.

On Sat, 5 Sep 2020 at 13:27, <mylists@posteo.de> wrote:

> Hi,
>
> this is my first post to this mailinglist. I am no native speaker...
> if something sound somehow ... I will try to give my best.... ;)
>
>
> I am using GENTOO Linux, which compiles everything on the target
> instead of pulling ready compiled, binary packages into the system.
>
> I did a fresh install of Texlive 2020 via the package-manager
> "emerge". On Gentoo this is handled via a "virtual package", which
> can be configured beforehand to include or exclude certain parts.
>
> I choose to get the HUGE package (incluing LaTeX, ConTeXt, plainTeX
> and others).
>
> After the installation I tried to typeset examples of a LaTeX- and
> a plain TeX document, which works out of the box.
>
> Then I tried a ConTeXt document and it fails:
>
>     context somefile.tex
>
> gave me:
>
> mtxrun          | unknown script 'context.lua' or 'mtx-context.lua'
>
> .
>
> While searching the internet I found, that one has to run
>
> mtxrun --generate
>
> in advance.
>
> Doing so mtxrun starts to index my whole harddisk starting with
> my $HOME, from which I started it.
>
> It reports A LOT of "confusing file"s....
>
> I searched the installed TeXlive installation for context.lua
> and mtx-context.lua -- they were installed and not "totally" missing.
>
> So I tried/guessed to run
>
> mtxrun --generate /usr/share/texmf-dist /usr/share/texlive-site
>
> and the file under $HOME were no longer indexed.
>
> context somefile.tex
>
> gave me the above mentioned error still, though.
>
> It "feels" like context does not respect setting made via
> the configuration settings under /etc/texmf...
>
> So I "hacked" (really, it was a crude hack/idea...nothing
> more) TEXMF and inserted
>
> export TEXMF=/usr/share/texmf-dist:/usr/share/texlive-site
>
> into my shells RC-file, restarted the shell and
>
> now
>
> context somefile.tex
>
> "worked"...:
>
> Each time it seems to re-index parts of ???, reports a lot
> of "confusing file"s but creates a valid looking pdf.
>
> I think, the package setup provided by GENTOO has a problem
> I want to help to fix that...but I have no clue, what the
> real culprit is here...
>
> Setting TEXMF this way feels like a random and accidentally
> working hack and I already feel the next problem raising up
> at the horizon...
>
> Some additional problems:
>
> tlmgr does not work
>
> mtxrun partially does not find its own modules
>
> mtxrun --variables
>
> lists a LOT of unset environment variables
>
> ...
>
> It looks like some basic and fundamental "initial" environment
> variable is missing.
>
> But I need a knowledgeable guru before I am able to get nearer
> to the root of the culprit.
>
> Thank you very much in advance for any help offered!
>
> \cheers
> Meino
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
>
> ___________________________________________________________________________________
>