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-rw-r--r--pkgs/development/haskell-modules/default.nix3
1 files changed, 2 insertions, 1 deletions
diff --git a/pkgs/development/haskell-modules/default.nix b/pkgs/development/haskell-modules/default.nix
index 8090732ddee6..8e7d19e089fd 100644
--- a/pkgs/development/haskell-modules/default.nix
+++ b/pkgs/development/haskell-modules/default.nix
@@ -2,6 +2,7 @@
 , compilerConfig ? (self: super: {})
 , packageSetConfig ? (self: super: {})
 , overrides ? (self: super: {})
+, initialPackages ? import ./hackage-packages.nix
 }:
 
 let
@@ -10,7 +11,7 @@ let
   inherit (import ./lib.nix { inherit pkgs; }) overrideCabal makePackageSet;
 
   haskellPackages = makePackageSet {
-    package-set = import ./hackage-packages.nix;
+    package-set = initialPackages;
     inherit ghc;
   };