diff --git a/pkgs/development/libraries/haskell/hspec/default.nix b/pkgs/development/libraries/haskell/hspec/default.nix
index 79f4696362b6..bc194108d337 100644
--- a/pkgs/development/libraries/haskell/hspec/default.nix
+++ b/pkgs/development/libraries/haskell/hspec/default.nix
@@ -12,6 +12,7 @@ cabal.mkDerivation (self: {
     ansiTerminal filepath hspecExpectations HUnit QuickCheck setenv
     silently time transformers
   ];
+  jailbreak = true;
   meta = {
     homepage = "http://hspec.github.com/";
     description = "Behavior-Driven Development for Haskell";