cabal2nix: fix build with old versions of GHC

1 files changed, 1 insertions, 0 deletions

diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index 4fcab8e9d6d..eb3b3a39d24 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -37,6 +37,7 @@
     attoparsec = self.attoparsec_0_11_3_1;
     binaryConduit = super.binaryConduit.override { binary = self.binary_0_7_2_1; };
     bson = super.bson.override { dataBinaryIeee754 = self.dataBinaryIeee754.override { binary = self.binary_0_7_2_1; }; };
+    cabal2nix = super.cabal2nix.override { hackageDb = super.hackageDb.override { Cabal = self.Cabal_1_18_1_3; }; };
     criterion = super.criterion.override {
       statistics = self.statistics.override {
         vectorBinaryInstances = self.vectorBinaryInstances.override { binary = self.binary_0_7_2_1; };