diff --git a/pkgs/tools/package-management/cabal-install/1.20.0.2.nix b/pkgs/tools/package-management/cabal-install/1.20.0.3.nix
similarity index 90%
rename from pkgs/tools/package-management/cabal-install/1.20.0.2.nix
rename to pkgs/tools/package-management/cabal-install/1.20.0.3.nix
index dba92ab9321..ffcaee203b7 100644
--- a/pkgs/tools/package-management/cabal-install/1.20.0.2.nix
+++ b/pkgs/tools/package-management/cabal-install/1.20.0.3.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "cabal-install";
-  version = "1.20.0.2";
-  sha256 = "1nsc8qklhlg2xpaj7k158gg45rlrp7mn15zyfsgjpaqf3rjm9dl4";
+  version = "1.20.0.3";
+  sha256 = "050b9dc4khfc1fs283p1635zni25z4b55gi5ffwvg4mfpkrmdgfj";
   isLibrary = false;
   isExecutable = true;
   buildDepends = [
diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index a770cbdda8f..ba785f3ef55 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -15,13 +15,13 @@
   # Older compilers inherit the overrides from newer ones.
 
   ghcHEADPrefs = self : super : super // {
-    cabalInstall_1_20_0_2 = super.cabalInstall_1_20_0_2.override { Cabal = null; };
+    cabalInstall_1_20_0_3 = super.cabalInstall_1_20_0_3.override { Cabal = null; };
     mtl = self.mtl_2_2_1;
     transformersCompat = super.transformersCompat_0_3_3;
   };
 
   ghc782Prefs = self : super : ghcHEADPrefs self super // {
-    cabalInstall_1_20_0_2 = super.cabalInstall_1_20_0_2.override { Cabal = self.Cabal_1_20_0_1; };
+    cabalInstall_1_20_0_3 = super.cabalInstall_1_20_0_3.override { Cabal = self.Cabal_1_20_0_1; };
     codex = super.codex.override { hackageDb = super.hackageDb.override { Cabal = self.Cabal_1_20_0_1; }; };
     mtl = self.mtl_2_1_2;
   };
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 3d8fe5578d1..560b0b77ce6 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -2826,8 +2826,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
   cabalInstall_0_14_0 = callPackage ../tools/package-management/cabal-install/0.14.0.nix {};
   cabalInstall_1_16_0_2 = callPackage ../tools/package-management/cabal-install/1.16.0.2.nix { Cabal = self.Cabal_1_16_0_3; };
   cabalInstall_1_18_0_3 = callPackage ../tools/package-management/cabal-install/1.18.0.3.nix { Cabal = self.Cabal_1_18_1_3; };
-  cabalInstall_1_20_0_2 = callPackage ../tools/package-management/cabal-install/1.20.0.2.nix { Cabal = self.Cabal_1_20_0_1; };
-  cabalInstall = self.cabalInstall_1_20_0_2;
+  cabalInstall_1_20_0_3 = callPackage ../tools/package-management/cabal-install/1.20.0.3.nix { Cabal = self.Cabal_1_20_0_1; };
+  cabalInstall = self.cabalInstall_1_20_0_3;
 
   codex = callPackage ../development/tools/haskell/codex {};