2 files changed, 4 insertions, 0 deletions
diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 56ffd6ee54ee..1a6d38ba5d8d 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -893,6 +893,9 @@ self: super: {
   # https://github.com/aisamanra/config-ini/issues/12
   config-ini = dontCheck super.config-ini;
 
+  # We've remove cpython 3.4 from nixpkgs
+  cpython = null;
+
   # doctest >=0.9 && <0.12
   genvalidity-property = doJailbreak super.genvalidity-property;
   path = dontCheck super.path;
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 8f230c92aaa1..a0bf655a67b7 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -443,6 +443,7 @@ stdenv.mkDerivation ({
 
     env = shellFor {
       packages = p: [ drv ];
+      inherit shellHook;
     };
 
   };