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Re: Recursively propagate build-system 'arguments' to dependency package

From: Eric Bavier
Subject: Re: Recursively propagate build-system 'arguments' to dependency packages?
Date: Mon, 6 Feb 2017 20:19:36 -0600

On Mon, 06 Feb 2017 21:09:33 +0000
Myles English <address@hidden> 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.


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