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-rw-r--r--pkgs/top-level/haskell-packages.nix5
1 files changed, 4 insertions, 1 deletions
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index a802623df8e9..14bb80ebf04d 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -60,7 +60,10 @@ rec {
 
     uhc = callPackage ../development/compilers/uhc/default.nix ({
       stdenv = pkgs.clangStdenv;
-      inherit (pkgs.haskellPackages) ghcWithPackages;
+      # UHC 1.1.9.2 is incompatible with hashable 1.2.4.0,
+      # latest LTS with a compatible hashable is LTS 4.1
+      # See also https://github.com/UU-ComputerScience/uhc/issues/69
+      inherit (pkgs.haskell.packages.lts-4_1) ghcWithPackages;
     });
 
   };