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haskell: provide a meta package "unbuildable" to fix evaluation of Win32

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Peter Simons 2017-09-25 09:45:27 +02:00
parent 69c4f038de
commit 92576b77e9
1 changed files with 5 additions and 0 deletions
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5
pkgs/development/haskell-modules/configuration-common.nix
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@ -34,6 +34,11 @@ self: super: {
ghcjs-base = null;
ghcjs-prim = null;
# Some packages add this (non-existent) dependency to express that they
# cannot compile in a given configuration. Win32 does this, for example, when
# compiled on Linux. We provide the name to avoid evaluation errors.
unbuildable = throw "package depends on meta package 'unbuildable'";
# cabal-install needs Cabal 2.x. hackage-security's test suite does not compile with
# Cabal 2.x, though. See https://github.com/haskell/hackage-security/issues/188.
cabal-install = super.cabal-install.overrideScope (self: super: { Cabal = self.Cabal_2_0_0_2; });