Comment 12 for bug 1532631

After some more investigation I foud a workaround, it consists of telling the installer to ignore the dependency on libtag1-vanilla. Mixxx does install and run using the installed libtag1v5-vanilla, however I've done essentially no testing.

# dpkg --ignore-depends=libtag1-vanilla -i /home/markus/Downloads/mixxx_2.1.1-0ubuntu1_2.1_git6743_xenial_amd64.deb