diff --git a/build/virtualenv_packages.txt b/build/virtualenv_packages.txt
index eea84c35691d..97c88e1523ab 100644
--- a/build/virtualenv_packages.txt
+++ b/build/virtualenv_packages.txt
@@ -10,7 +10,6 @@ optional:setup.py:python/psutil:build_ext:--inplace
 optional:psutil.pth:python/psutil
 which.pth:python/which
 ply.pth:other-licenses/ply/
-codegen.pth:python/codegen/
 mock.pth:python/mock-1.0.0
 mozilla.pth:build
 mozilla.pth:config