diff --git a/pkgs/development/libraries/haskell/network-transport-tests/default.nix b/pkgs/development/libraries/haskell/network-transport-tests/default.nix
index ec14ac5e1732..5ee1edec2e98 100644
--- a/pkgs/development/libraries/haskell/network-transport-tests/default.nix
+++ b/pkgs/development/libraries/haskell/network-transport-tests/default.nix
@@ -7,6 +7,7 @@ cabal.mkDerivation (self: {
   version = "0.2.1.0";
   sha256 = "17qf52a76an9ignhb85alz92j9vk3p0ydmaqys8b1ss5mkqipm64";
   buildDepends = [ ansiTerminal mtl networkTransport random ];
+  jailbreak = true;
   meta = {
     homepage = "http://haskell-distributed.github.com";
     description = "Unit tests for Network.Transport implementations";