On Sun, Apr 5, 2015 at 7:21 AM, Mark H Weaver <m...@netris.org> wrote: > I believe this will require GHC to build *any* non-empty profile. Since > GHC is only available on Intel platforms, this will break profile > building on MIPS and ARM. > > Even on Intel platforms, I don't want to have to install GHC to build > profiles that don't contain any Haskell packages, especially since it > involves trusting the upstream binaries from GHC.
Good point. Would this check be satisfactory for you? ;; Don't depend on GHC when there's nothing to do. (if (any (cut string-prefix? "ghc" <>) (map manifest-entry-name (manifest-entries manifest))) (gexp->derivation "ghc-package-cache" build #:modules '((guix build utils)) #:local-build? #t) (gexp->derivation "ghc-package-cache" #~(mkdir #$output)))) > > What if I want to use Hugs instead, or some other Haskell implementation > that is capable of being bootstrapped from source code. Is GHC the only > tool that can do this job? As far as I know, the library database is compiler specific. Here we are handling GHC only. But, if you know better, don't hesitate to make a concrete suggestion. Regards, Fede