diff --git a/pkgs/development/libraries/haskell/happstack/happstack-server.nix b/pkgs/development/libraries/haskell/happstack/happstack-server.nix
index 88651c62b590..8b2bec395fc6 100644
--- a/pkgs/development/libraries/haskell/happstack/happstack-server.nix
+++ b/pkgs/development/libraries/haskell/happstack/happstack-server.nix
@@ -17,6 +17,7 @@ cabal.mkDerivation (self: {
   ];
   testDepends = [ HUnit parsec zlib ];
   doCheck = false;
+  jailbreak = true;
   meta = {
     homepage = "http://happstack.com";
     description = "Web related tools and services";