A ticket has been filed for both components involved. => python-postman-0.6.0-6.fc20.src.rpm => python-postman-0.6.0-6.fc20.noarch in fedora-development-i386 File conflict with: python-mwlib-0.15.11-1.fc20.i686 /usr/bin/postman [semi-automated bug report]
This is my bad, don't worry about fixing your package. (mwlib is bug 998164)