haskell-hspec-core: needs latest QuickCheck to compile tests

pkgs/development/haskell-modules/configuration-common.nix

@@ -296,7 +296,6 @@ self: super: {
   hs2048 = dontCheck super.hs2048;
   hsbencher = dontCheck super.hsbencher;
   hsexif = dontCheck super.hsexif;
-  hspec-core = if pkgs.stdenv.isi686 then dontCheck super.hspec-core else super.hspec-core; # tests rely on `Int` being 64-bit; https://github.com/hspec/hspec/issues/431
   hspec-server = dontCheck super.hspec-server;
   HTF = dontCheck super.HTF;
   htsn = dontCheck super.htsn;
@@ -1437,6 +1436,11 @@ self: super: {
     doCheck = false;
   });
 
+  # tests rely on `Int` being 64-bit: https://github.com/hspec/hspec/issues/431
+  hspec-core = let hspec-core = super.hspec-core.overrideScope (self: super: { QuickCheck = self.QuickCheck_2_14_1; }); in
+               if pkgs.stdenv.isi686 then dontCheck hspec-core else hspec-core;
+  QuickCheck_2_14_1 = super.QuickCheck_2_14_1.override { splitmix = dontCheck super.splitmix_0_1_0_1; };
+
   # INSERT NEW OVERRIDES ABOVE THIS LINE
 
 } // (let