See tracker bug.
I've bumped to -r1 to fix this (and a couple of other issues) since otherwise there seems to be nothing wrong with the package and it's still shipped by some other distros. https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=1e3f09e05fd96cf49f3cffe816fcb94b2a912703 Leaving this bug open in case you want to track the removal of -r0.
Feel free to drop the older versions you need