Run static analysis on the exact source set
Run static analysis on the exact source set

It prevents running flake8 on the entire virtualenv when
located at top source directory.

tuukkamustonen/voluptuous,tuukkamustonen/voluptuous,alecthomas/voluptuous,jmwri/voluptuous,divanovGH/voluptuous,alecthomas/voluptuous,SimplyKnownAsG/voluptuous,SimplyKnownAsG/voluptuous