udev looks for rules in 2 locations /etc/udev/rules.d/ and /lib/udev/rules.d/. system defined rules are supposed to be installed in /lib/udev/rules.d/ and not in etc, however thinkfinger installs the rules into /etc/udev/rules.d/. Reproducible: Always checked with version 0.3-r2
Created attachment 254479 [details] fixed ebuild for sys-auth/thinkfinger-0.3-r2
fixed in current version