diff --git a/pkgs/development/haskell-modules/default.nix b/pkgs/development/haskell-modules/default.nix
index 27f3ccd97328..7a51a1de1471 100644
--- a/pkgs/development/haskell-modules/default.nix
+++ b/pkgs/development/haskell-modules/default.nix
@@ -8,6 +8,8 @@ let
 
   inherit (stdenv.lib) fix' extends;
 
+  inherit (import ./lib.nix { inherit pkgs; }) hackage2nix;
+
   haskellPackages = self:
     let
 
@@ -57,6 +59,8 @@ let
 
         inherit mkDerivation callPackage;
 
+        callHackage = name: version: self.callPackage (hackage2nix name version);
+
         ghcWithPackages = selectFrom: withPackages (selectFrom self);
 
         ghcWithHoogle = selectFrom: