haskellPackages.snap-core: do jailbreak to allow newer attoparsec

pkgs/development/haskell-modules/configuration-common.nix

@@ -362,7 +362,7 @@ self: super: {
   separated = dontCheck super.separated;
   shadowsocks = dontCheck super.shadowsocks;
   shake-language-c = dontCheck super.shake-language-c;
-  snap-core = dontCheck super.snap-core;
+  snap-core = doJailbreak (dontCheck super.snap-core); # attoparsec bound is too strict. This has been fixed on master
   sourcemap = dontCheck super.sourcemap;
   static-resources = dontCheck super.static-resources;
   strive = dontCheck super.strive;                      # fails its own hlint test with tons of warnings