diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 16855842464..6c75c1f3550 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -304,7 +304,7 @@ stdenv.mkDerivation ({
         export NIX_${ghcCommandCaps}="${ghcEnv}/bin/${ghcCommand}"
         export NIX_${ghcCommandCaps}PKG="${ghcEnv}/bin/${ghcCommand}-pkg"
         export NIX_${ghcCommandCaps}_DOCDIR="${ghcEnv}/share/doc/ghc/html"
-        export NIX_${ghcCommandCaps}_LIBDIR="${ghcEnv}/lib/${ghcEnv.name}"
+        export NIX_${ghcCommandCaps}_LIBDIR="${ghcEnv}/lib/${ghcCommand}-${ghc.version}"
         ${shellHook}
       '';
     };