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?
Myles
