i installed csound 6.04 with the python and csoundac USE flags activated. the modules are built but not installed, they remain under /var/tmp/portage/ : $ equery f csound | grep python /var/tmp/portage/media-sound/csound-6.04/homedir/.local/lib64/python2.7 /var/tmp/portage/media-sound/csound-6.04/homedir/.local/lib64/python2.7/site-packages /var/tmp/portage/media-sound/csound-6.04/homedir/.local/lib64/python2.7/site-packages/CsoundAC.py /var/tmp/portage/media-sound/csound-6.04/homedir/.local/lib64/python2.7/site-packages/_CsoundAC.so /var/tmp/portage/media-sound/csound-6.04/homedir/.local/lib64/python2.7/site-packages/_csnd6.so /var/tmp/portage/media-sound/csound-6.04/homedir/.local/lib64/python2.7/site-packages/csnd6.py /var/tmp/portage/media-sound/csound-6.04/homedir/.local/lib64/python2.7/site-packages/icsound.py
+ 08 Jul 2015; Ben de Groot <yngwin@gentoo.org> +csound-6.05.0.ebuild, + +files/csound-6.05-python.patch: + Version bump. Use github. Fix installation of python modules (bug #550084).
thanks, problem solved!