diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 7a44d9303bd8..5e7a54e580a0 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -317,5 +317,9 @@ rec {
       packageSetConfig = callPackage ../development/haskell-modules/configuration-lts-3.20.nix { };
     };
 
+    lts-4_0 = packages.ghc7102.override {
+      packageSetConfig = callPackage ../development/haskell-modules/configuration-lts-4.0.nix { };
+    };
+
   };
 }