diff --git a/build/pkgs/rst2ipynb/checksums.ini b/build/pkgs/rst2ipynb/checksums.ini
index b8263f193a2..de9e93fce3f 100644
--- a/build/pkgs/rst2ipynb/checksums.ini
+++ b/build/pkgs/rst2ipynb/checksums.ini
@@ -2,3 +2,4 @@ tarball=rst2ipynb-VERSION.tar.gz
 sha1=98926df9a8336c8974f446a2a858458495b5aec4
 md5=eedfb3d5b8634e36b680ad86771cec38
 cksum=3973650989
+upstream_url=https://pypi.io/packages/source/r/rst2ipynb/rst2ipynb-VERSION.tar.gz