Created attachment 443732 [details] emerge --info Verified for chromium ebuilds chromium-46.0.2490.42 chromium-47.0.2526.16 and chromium-53.0.2785.34 built with python 3.5 (probably exists in python 2.7 also) using doman as installed by portage-2.3.0. Builds are using unusual PORTAGE_TMPDIR via /etc/portage/package.env: PORTAGE_TMPDIR="/var/tmp/portage.no.tmpfs" to work around fixed-size tmpfs /var/tmp/portage. Apparently doman mangles the resulting build tree pathnames. Excerpt from failed build log: (whole thing is megs, available on request.) + doins -r out/Release/locales + doins -r out/Release/resources + newman out/Release/chrome.1 chromium.1 install: cannot create regular file ‘/var/tmp/portage.no.tmpfs/portage/www-client/chromium-46.0.2490.42/image//usr/share/man/no/man1/portage.tmpfs/portage/www-client/chromium-46.0.2490.42/temp/.newins_tmp_tmVA6r/chromium.1’: No such file or directory * ERROR: www-client/chromium-46.0.2490.42::gentoo failed (install phase): * doman failed Changing the regex in /usr/lib/portage/python*/ebuild-helpers/doman from: "(.*)\.([a-z][a-z](_[A-Z][A-Z])?)\.(.*)" to: "([^/]*)\.([a-z][a-z](_[A-Z][A-Z])?)\.([^/]*)" Solves the problem. Discussion and other context available at: https://forums.gentoo.org/viewtopic-p-7820972.html