diff --git a/pkgs/development/libraries/haskell/websockets/default.nix b/pkgs/development/libraries/haskell/websockets/default.nix
index 5db1ec41613..c74fad5f1a8 100644
--- a/pkgs/development/libraries/haskell/websockets/default.nix
+++ b/pkgs/development/libraries/haskell/websockets/default.nix
@@ -19,6 +19,7 @@ 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";