I was having issues getting an RPM to build. My error was
Processing files: superset-0.20.1-1.noarch
error: File must begin with "/": Lockup
error: File must begin with "/": With
error: File must begin with "/": Text.svg
error: File must begin with "/": Lockup
error: File must begin with "/": With
error: File must begin with "/": Text@2x.png
error: File must begin with "/": Lockup
error: File must begin with "/": Without
error: File must begin with "/": Text@1x.svg
error: File must begin with "/": Lockup
error: File must begin with "/": Without
error: File must begin with "/": Text@2x.png
error: File must begin with "/": Mark.png
error: File must begin with "/": Mark@1x.svg
for ref https://github.com/pypa/setuptools/issues/767
File renaming fixes this issue