I'm seeing exactly the same error message ...

On Saturday, 23 January 2016 15:36:36 UTC, Cesar wrote:

On 22/01/2016 01:09 p.m., John MACFARLANE wrote:
 > git submodule update

I did it, but I get:

--------------------
[...]
While constructing the BuildPlan the following exceptions were encountered:

--  Failure when adding dependencies:
       pandoc: needed (==1.16.*), 1.17 found (latest is 1.16)
     needed for package: pandoc-citeproc-0.9
--------------------

Commands used:
git submodule update
git pull
stack install --test --install-ghc --stack-yaml stack.full.yaml

Many thanks in advance,

--
Cesar