I emerged mhonarc-2.6.15 and it put the mhonarc executable into /bin for example. Look like the prefix is set to / instead of /usr
In mhonarc-2.6.15.ebuild in this line: sed -e "s|\$(INSTALLPRG)|\$(INSTALLPRG) -prefix ${D}|g" -i Makefile if I put a /usr after ${D}, so the line looks like: sed -e "s|\$(INSTALLPRG)|\$(INSTALLPRG) -prefix ${D}/usr|g" -i Makefile Then it installs correctly into /usr I don't know if it is a dirty hack.
Looks like this was fixed together with #123134