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 633ac6e4f752..7d5f07f61fbe 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.12.x.nix
@@ -115,6 +115,7 @@ with haskellLib;
     self.HUnit
   ] super.ghc-exactprint_1_12_0_0;
   timezone-series = doJailbreak super.timezone-series; # time <1.14
+  cabal-plan = doJailbreak super.cabal-plan; # base <4.21
 
   #
   # Test suite issues