diff --git a/pkgs/development/python-modules/cryptography/default.nix b/pkgs/development/python-modules/cryptography/default.nix
index eddd7e0b4402..d21e6d060fe1 100644
--- a/pkgs/development/python-modules/cryptography/default.nix
+++ b/pkgs/development/python-modules/cryptography/default.nix
@@ -79,10 +79,6 @@ buildPythonPackage rec {
     py.test ${pytestFlags} tests
   '';
 
-  # IOKit's dependencies are inconsistent between OSX versions, so this is the best we
-  # can do until nix 1.11's release
-  __impureHostDeps = [ "/usr/lib" ];
-
   meta = with lib; {
     description = "A package which provides cryptographic recipes and primitives";
     longDescription = ''