diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index dda615e1f1d9..9bd6070a6a17 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -31,7 +31,7 @@
   ghc784Prefs = self : super : ghcHEADPrefs self super // {
     cabalInstall_1_20_0_6 = super.cabalInstall_1_20_0_6.override { Cabal = self.Cabal_1_20_0_3; };
     codex = super.codex.override { hackageDb = super.hackageDb.override { Cabal = self.Cabal_1_20_0_3; }; };
-    jailbreakCabal = super.jailbreakCabal.override { Cabal = self.Cabal_1_22_0_0; };
+    jailbreakCabal = super.jailbreakCabal.override { Cabal = self.Cabal_1_20_0_3; };
     MonadRandom = self.MonadRandom_0_2_0_1; # newer versions require transformers >= 0.4.x
     mtl = self.mtl_2_1_3_1;
     transformersCompat = super.transformersCompat.override { cabal = self.cabal.override {