diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
index 6dc578213834..c2889555e536 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
@@ -342,4 +342,7 @@ self: super: {
   # https://github.com/lymar/hastache/issues/47
   hastache = dontCheck super.hastache;
 
+  # The compat library is empty in the presence of mtl 2.2.x.
+  mtl-compat = dontHaddock super.mtl-compat;
+
 }
diff --git a/pkgs/development/haskell-modules/configuration-ghc-head.nix b/pkgs/development/haskell-modules/configuration-ghc-head.nix
index 25480d34cd29..cef72a2b1884 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-head.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-head.nix
@@ -78,4 +78,7 @@ self: super: {
             in addBuildDepends jsaddle' [ self.glib self.gtk3 self.webkitgtk3
                                           self.webkitgtk3-javascriptcore ];
 
+  # The compat library is empty in the presence of mtl 2.2.x.
+  mtl-compat = dontHaddock super.mtl-compat;
+
 }