haskell-websockets: re-generate with cabal2nix

pkgs/development/libraries/haskell/websockets/default.nix

@@ -17,6 +17,7 @@ cabal.mkDerivation (self: {
     entropy HUnit ioStreams mtl network QuickCheck random SHA
     testFramework testFrameworkHunit testFrameworkQuickcheck2 text
   ];
+  jailbreak = true;
   meta = {
     homepage = "http://jaspervdj.be/websockets";
     description = "A sensible and clean way to write WebSocket-capable servers in Haskell";
@@ -24,5 +25,4 @@ cabal.mkDerivation (self: {
     platforms = self.ghc.meta.platforms;
     maintainers = [ self.stdenv.lib.maintainers.ocharles ];
   };
-  jailbreak = true;
 })