diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 6e582454e9ce..39bdfe3fd031 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -9,7 +9,7 @@
 #
 # See comment at the top of configuration-nix.nix for more information about this
 # distinction.
-{ pkgs, haskellLib }:
+{ buildPackages, pkgs, haskellLib }:
 
 with haskellLib;
 
@@ -1036,7 +1036,7 @@ self: super: {
 
   # The test suite does not know how to find the 'alex' binary.
   alex = overrideCabal super.alex (drv: {
-    testSystemDepends = (drv.testSystemDepends or []) ++ [pkgs.which];
+    testToolDepends = (drv.testSystemDepends or []) ++ [ buildPackages.which ];
     preCheck = ''export PATH="$PWD/dist/build/alex:$PATH"'';
   });
 
diff --git a/pkgs/development/haskell-modules/default.nix b/pkgs/development/haskell-modules/default.nix
index 7b512e46da80..5d253cb3c2b8 100644
--- a/pkgs/development/haskell-modules/default.nix
+++ b/pkgs/development/haskell-modules/default.nix
@@ -1,4 +1,4 @@
-{ pkgs, stdenv, lib, haskellLib, ghc, all-cabal-hashes
+{ buildPackages, pkgs, stdenv, lib, haskellLib, ghc, all-cabal-hashes
 , buildHaskellPackages
 , compilerConfig ? (self: super: {})
 , packageSetConfig ? (self: super: {})
@@ -18,7 +18,7 @@ let
     inherit stdenv haskellLib ghc buildHaskellPackages extensible-self all-cabal-hashes;
   };
 
-  commonConfiguration = configurationCommon { inherit pkgs haskellLib; };
+  commonConfiguration = configurationCommon { inherit buildPackages pkgs haskellLib; };
   nixConfiguration = configurationNix { inherit pkgs haskellLib; };
 
   extensible-self = makeExtensible