main/pax-utils: upstream source is missing
gentoo developer ~slyfox has left the gentoo project and had his dev account retired:
https://trofi.github.io/posts/226-farewell-gentoo-dev.html
as such, the URL previously hosting the distfiles for pax-utils is gone, so the source cannot be fetched.
gentoo's ebuild file also lists "https://dev.gentoo.org/~vapier/dist/${P}.tar.xz" as a source, but 1.3 is the most recent version offered at that address.