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-rw-r--r--pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix3
1 files changed, 3 insertions, 0 deletions
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
index 2c1c825af53..f909336e669 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
@@ -46,4 +46,7 @@ self: super: {
   # https://github.com/hspec/hspec/issues/253
   hspec-core = dontCheck super.hspec-core;
 
+  # Deviate from Stackage here to fix lots of builds.
+  transformers-compat = super.transformers-compat_0_5_1_4;
+
 }