diff --git a/pkgs/development/libraries/haskell/llvm-general/3.4.1.0.nix b/pkgs/development/libraries/haskell/llvm-general/3.4.2.1.nix
similarity index 88%
rename from pkgs/development/libraries/haskell/llvm-general/3.4.1.0.nix
rename to pkgs/development/libraries/haskell/llvm-general/3.4.2.1.nix
index b86a65618cd..a219f227575 100644
--- a/pkgs/development/libraries/haskell/llvm-general/3.4.1.0.nix
+++ b/pkgs/development/libraries/haskell/llvm-general/3.4.2.1.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "llvm-general";
-  version = "3.4.1.0";
-  sha256 = "0vh0bqkkahafhiv1sqvrncxswvz4rvb2zfwf33936fnnh5vn8vyp";
+  version = "3.4.2.1";
+  sha256 = "0967pijv6x5l80igdcp1nza6ix32i8s8z3hzmp6qa9nx25sqviw1";
   buildDepends = [
     llvmGeneralPure mtl parsec setenv transformers utf8String
   ];
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 0226294ced1..f5cae5fe298 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1635,10 +1635,10 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     llvmConfig = pkgs.llvm_33;
     llvmGeneralPure = self.llvmGeneralPure_3_3_8_2;
   };
-  llvmGeneral_3_4_1_0 = callPackage ../development/libraries/haskell/llvm-general/3.4.1.0.nix {
+  llvmGeneral_3_4_2_1 = callPackage ../development/libraries/haskell/llvm-general/3.4.2.1.nix {
     llvmConfig = pkgs.llvm;
   };
-  llvmGeneral = self.llvmGeneral_3_4_1_0;
+  llvmGeneral = self.llvmGeneral_3_4_2_1;
 
   llvmGeneralPure_3_3_8_2 = callPackage ../development/libraries/haskell/llvm-general-pure/3.3.8.2.nix { };
   llvmGeneralPure_3_4_2_1 = callPackage ../development/libraries/haskell/llvm-general-pure/3.4.2.1.nix {};