orig. bug: http://bugs.gentoo.org/show_bug.cgi?id=344657
build.log: http://bugs.gentoo.org/attachment.cgi?id=253603

important part of the log:

make[2]: *** No rule to make target `hr.gmo', needed by `all-yes'.  Stop.
make[2]: Leaving directory `/var/tmp/portage/media-gfx/ristretto-0.0.91/work/ristretto-0.0.91/po'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/media-gfx/ristretto-0.0.91/work/ristretto-0.0.91'
make: *** [all] Error 2
make failed


$ grep hr configure.in 
XDT_I18N([ar ast bg ca cs da de el en_GB es eu fi fr gl hr hu id it ja lv nb nl pl pt_BR pt ru sk sv tr ug uk ur_PK ur vi zh_CN ])      ^^ <- here

$ ls po/hr*
ls: cannot access po/hr*: No such file or directory

^^ no matching .po file, but the git has hr.po, why didn't it end up in the tarball?