On Mon, 06 Feb 2017 21:09:33 +0000 Myles English <[email protected]> wrote:
> Trying to define a package to be compiled by ghc-8, and I think all of > its dependencies must also be compiled by ghc-8 rather than ghc (which > is version 7). This is easy to do with one package, e.g..: > > (define-module (my-packages myhaskell) > ... > #:use-module ((gnu packages haskell) #:prefix haskellmain:)) > > (define-public ghc-hunit8 > (package > (inherit haskellmain:ghc-hunit) > (arguments `(#:haskell ,ghc-8)))) > > To do that recursively for all the dependencies seems Too Difficult so, > is there a way to do something like --with-input=ghc=ghc-8 but with the > build-system arguments? Perhaps doing the work in between the Bag and > the Derivation? You may take a look at the 'package-with-python2' procedure in guix/build-system/python.scm, which seems like it could be adapted to work with haskell/ghc packages. `~Eric
