diff --git a/lib/assets/libs/_posixsubprocess.js b/lib/assets/libs/_posixsubprocess.js
new file mode 100644
--- /dev/null
+++ b/lib/assets/libs/_posixsubprocess.js
@@ -0,0 +1,6 @@
+var $module=(function($B){
+
+    return {
+       cloexec_pipe: function() {}   // fixme
+    }
+})(__BRYTHON__)