diff --git a/buildsupport/zpkg-support.pth b/buildsupport/zpkg-support.pth
new file mode 100644
index 0000000000000000000000000000000000000000..cef1039a818b9a2e5cce41c345461d0e01f41b5e
--- /dev/null
+++ b/buildsupport/zpkg-support.pth
@@ -0,0 +1,8 @@
+# This allows the ZConfig checked out with Zope to be used by the zpkg
+# code invoked by setup.py.
+#
+# If zpkg ever requires a different version of ZConfig than Zope
+# provides as part of it's checkout, this file should be replaced by
+# an svn:external to the required version.
+#
+../src