The ebuild contains the following entry: DEPEND=" <dev-python/pycxx-6.2.0[${PYTHON_USEDEP}] <dev-vcs/subversion-1.8" # (bug #395533) However, the bug referenced above is long resolved. Thus, the dependency can be removed. Thanks!
+ 07 Jan 2014; Lars Wendler <polynomial-c@gentoo.org> pysvn-1.7.8.ebuild: + Fixed dependency on subversion (bug #497400). + Tested compilation with subversion-1.8.5