1 files changed, 4 insertions, 0 deletions
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
index 49c3623d5d6b..8d0669ca2acb 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.4.x.nix
@@ -56,4 +56,8 @@ self: super: {
           };
     in appendPatch super.hadoop-rpc patch;
 
+  # Version 1.9.1 needs Cabal 2.4.x or later, so
+  # we use the one from the ghc-8.6.1 package set.
+  stack = markBroken super.stack;
+
 }