diff --git a/pkgs/development/libraries/haskell/parallel-io/default.nix b/pkgs/development/libraries/haskell/parallel-io/default.nix
index b9f6eda669e..2bf50add862 100644
--- a/pkgs/development/libraries/haskell/parallel-io/default.nix
+++ b/pkgs/development/libraries/haskell/parallel-io/default.nix
@@ -9,6 +9,7 @@ cabal.mkDerivation (self: {
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ extensibleExceptions random ];
+  jailbreak = true;
   meta = {
     homepage = "http://batterseapower.github.com/parallel-io";
     description = "Combinators for executing IO actions in parallel on a thread pool";