diff --git a/pkgs/tools/package-management/cabal-install/1.20.0.0.nix b/pkgs/tools/package-management/cabal-install/1.20.0.1.nix
similarity index 90%
rename from pkgs/tools/package-management/cabal-install/1.20.0.0.nix
rename to pkgs/tools/package-management/cabal-install/1.20.0.1.nix
index 0c7bd5f473c..d0db9354ae0 100644
--- a/pkgs/tools/package-management/cabal-install/1.20.0.0.nix
+++ b/pkgs/tools/package-management/cabal-install/1.20.0.1.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "cabal-install";
-  version = "1.20.0.0";
-  sha256 = "0m05wjmi8b07xzri3d7y7bwcxmd1asj3kcg9c1idhjwmg2nla2dz";
+  version = "1.20.0.1";
+  sha256 = "14zrsbjr7kgrnjd5hxczll4j39vwj95drlw73gad2div2954dqxi";
   isLibrary = false;
   isExecutable = true;
   buildDepends = [
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index ba2c4c827b2..af345b228dc 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -173,7 +173,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     vector       = self.vector_0_10_9_1;
     xhtml        = self.xhtml_3000_2_1;
     zlib         = self.zlib_0_5_4_1;
-    cabalInstall = self.cabalInstall_1_20_0_0;
+    cabalInstall = self.cabalInstall_1_20_0_1;
     alex         = self.alex_3_1_3;
     haddock      = self.haddock_2_14_2;
     happy        = self.happy_1_19_3;
@@ -3130,7 +3130,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
   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_0 = callPackage ../tools/package-management/cabal-install/1.20.0.0.nix {
+  cabalInstall_1_20_0_1 = callPackage ../tools/package-management/cabal-install/1.20.0.1.nix {
     Cabal = self.Cabal_1_20_0_0;
   };
   cabalInstall = self.cabalInstall_1_20_0_0;