diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 928541cd9df..1bf97876d88 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -359,7 +359,10 @@ rec {
     lts-5_4 = packages.ghc7103.override {
       packageSetConfig = callPackage ../development/haskell-modules/configuration-lts-5.4.nix { };
     };
-    lts-5 = packages.lts-5_4;
+    lts-5_5 = packages.ghc7103.override {
+      packageSetConfig = callPackage ../development/haskell-modules/configuration-lts-5.5.nix { };
+    };
+    lts-5 = packages.lts-5_5;
 
     lts = packages.lts-5;
   };