diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix index 0aff4740fc9..bba72198e60 100644 --- a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix +++ b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix @@ -129,4 +129,7 @@ self: super: { # Needs hashable on pre 7.10.x compilers. nats = addBuildDepend super.nats self.hashable; + # needs mtl-compat to build with mtl 2.1.x + cgi = addBuildDepend super.cgi self.mtl-compat; + }