diff --git a/pkgs/development/python-modules/mocket/default.nix b/pkgs/development/python-modules/mocket/default.nix
index f4f048060795..78ff2568640d 100644
--- a/pkgs/development/python-modules/mocket/default.nix
+++ b/pkgs/development/python-modules/mocket/default.nix
@@ -77,7 +77,7 @@ buildPythonPackage rec {
   # Skip http tests, they require network access
   env.SKIP_TRUE_HTTP = true;
 
-  _darwinAllowLocalNetworking = true;
+  __darwinAllowLocalNetworking = true;
 
   disabledTests =
     [