diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
index da44762d969e..f59224e9b4a4 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
@@ -2,9 +2,10 @@
 
 let
   inherit (pkgs) lib;
-
 in
 
+with haskellLib;
+
 self: super: {
   llvmPackages = lib.dontRecurseIntoAttrs self.ghc.llvmPackages;
 
@@ -56,4 +57,6 @@ self: super: {
   unix = null;
   xhtml = null;
 
+  # Version upgrades
+  splitmix = doDistribute self.splitmix_0_1_1;
 }
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 60de9885a522..550b448ee268 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -709,6 +709,7 @@ self: super: builtins.intersectAttrs super {
 
   # Break infinite recursion cycle between QuickCheck and splitmix.
   splitmix = dontCheck super.splitmix;
+  splitmix_0_1_1 = dontCheck super.splitmix_0_1_1;
 
   # Break infinite recursion cycle with OneTuple and quickcheck-instances.
   foldable1-classes-compat = dontCheck super.foldable1-classes-compat;