On Thu, Sep 3, 2015 at 3:37 AM, David Banas <capn.freako@gmail.com> wrote:

Hi all,

How do I direct cabal to use an alternative (i.e. - not my system’s default) version of ghc, which I’ve installed, via stack?

I tried this:

stack exec cabal install ...

but got this:

cabal: Use of GHC's environment variable GHC_PACKAGE_PATH is incompatible with
Cabal. Use the flag --package-db to specify a package database (it can be used
multiple times).

Thanks,
-db

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We have a flag to working better with cabal, you can try:

stack exec --no-ghc-package-path -- cabal install

I'm under the impression that there are changes planned to cabal (possibly already implemented but not released) that will allow it to function nicely with the GHC_PACKAGE_PATH environment variable, but I'm uncertain if that's true.

Michael