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Add homebrew note

chrisdone 2014-12-21 11:27:31 -08:00
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Stackage-Server-FAQ.md

@ -51,4 +51,36 @@ We'll format this more nicely in the future, for now it's just a collection of b
* [Stackage Server](https://www.fpcomplete.com/blog/2014/05/stackage-server)
* [Announcing Stackage Server](https://www.fpcomplete.com/blog/2014/08/announcing-stackage-server)
* [The woes of multiple package versions](http://www.yesodweb.com/blog/2014/09/woes-multiple-package-versions)
* [The woes of multiple package versions](http://www.yesodweb.com/blog/2014/09/woes-multiple-package-versions)
# Homebrew users
Homebrew ships with a Cabal version newer than Stackage expects:
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.8.3
$ cabal --version
cabal-install version 1.20.0.4
using version 1.20.0.3 of the Cabal library
Stackage uses the Cabal version that ships with GHC, so when trying to install something you may get an error like:
Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: Cabal (user goal)
rejecting: Cabal-1.18.1.4/installed-d6c... (global constraint requires
==1.18.1.3)
trying: Cabal-1.18.1.3/installed-476...
trying: yesod-bin-1.4.2 (user goal)
next goal: ghc (dependency of yesod-bin-1.4.2)
rejecting: ghc-7.8.3/installed-1d5... (conflict:
Cabal==1.18.1.3/installed-476..., ghc => Cabal==1.18.1.4/installed-d6c...)
Dependency tree exhaustively searched.
The workaround is to edit your `cabal.config` with
``` diff
- Cabal ==1.18.1.3,
+ Cabal ==1.18.1.4,
```