Talk:Cabal/How to install a Cabal package
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I would like to add the following to the end of this topic:
(begin proposed addendum)
Note: If you have more than one Haskell compiler on your system,
use the --with-compiler option for the
configure step. That will ensure that Cabal
uses the correct compiler during the entire installation process.
For example:
runghc Setup.hs configure --with-compiler=ghc-6.8.2
runghc Setup.hs build
runghc Setup.hs install
(end proposed addendum)
Without this, I didn't know that you need to use that flag. I just ran runhaskell with an explicit path to the compiler that I wanted. Cabal then ran the wrong ghc-pkg, and registered the installation to the wrong compiler.