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 2511d163332e..17e881946848 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.8.x.nix
@@ -48,15 +48,16 @@ self: super: {
   # haddock-api 2.16 requires ghc>=7.10
   haddock-api = super.haddock-api_2_15_0_2;
 
-  # Idris requires mtl 2.2.x.
+  # Idris needs special version of some libraries
   idris = overrideCabal (super.idris.overrideScope (self: super: {
     mkDerivation = drv: super.mkDerivation (drv // { doCheck = false; });
-    blaze-markup = self.blaze-markup_0_6_2_0;
+    annotated-wl-pprint = self.annotated-wl-pprint_0_5_3;
     blaze-html = self.blaze-html_0_7_0_3;
+    blaze-markup = self.blaze-markup_0_6_2_0;
     haskeline = self.haskeline_0_7_2_1;
     lens = self.lens_4_7_0_1;
     mtl = self.mtl_2_2_1;
-    transformers = super.transformers_0_4_3_0;
+    transformers = self.transformers_0_4_3_0;
     transformers-compat = disableCabalFlag super.transformers-compat "three";
   })) (drv: {
     patchPhase = "find . -name '*.hs' -exec sed -i -s 's|-Werror||' {} +";