Dear Maintainer, attached patch makes your package to build correctly in a sid chroot environment.
Kind Regards
--- debian/rules 2021-01-25 16:23:50.215639571 +0100 +++ debian/rules.new 2021-01-25 16:23:40.541020908 +0100 @@ -22,3 +22,4 @@ override_dh_auto_clean: dh_auto_clean rm -rf nototools.egg-info + rm -r nototools/_version.py