/* If user need access to more haskell package for building his diagrams, he simply has to pass these package through the extra packages function as follow in `config.nix`: ~~~ diagrams-builder.override { extraPackages = self : [myHaskellPackage]; } ­~~~ */ { stdenv, ghcWithPackages, makeWrapper, diagrams-builder, extraPackages ? (self: []) }: let # Used same technique as for the yiCustom package. wrappedGhc = ghcWithPackages (self: [ diagrams-builder ] ++ extraPackages self); ghcVersion = wrappedGhc.version; exeWrapper = backend : '' makeWrapper \ "${diagrams-builder}/bin/diagrams-builder-${backend}" "$out/bin/diagrams-builder-${backend}" \ --set NIX_GHC ${wrappedGhc}/bin/ghc \ --set NIX_GHC_LIBDIR ${wrappedGhc}/lib/ghc-${ghcVersion} ''; backends = ["svg" "cairo" "ps"]; in stdenv.mkDerivation { name = "diagrams-builder"; buildInputs = [ makeWrapper ]; buildCommand = with stdenv.lib; concatStrings (intersperse "\n" (map exeWrapper backends)); # Will be faster to build the wrapper locally then to fetch it from a binary cache. preferLocalBuild = true; meta = diagrams-builder.meta; }