Fix HsOpenSSL tests

Author: hamishmack

test/exe-lib-dlls/default.nix

@@ -8,6 +8,7 @@ let
     inherit compiler-nix-name evalPackages;
     src = testSrc "exe-lib-dlls";
     cabalProjectLocal = builtins.readFile ../cabal.project.local;
+    modules = import ../modules.nix;
   };
 
   packages = project.hsPkgs;