Fixed pycuda-2013.1.1.ebuild
Since at least Oct 29 2013 until today (Feb 17 2014) official pycuda ebuild is broken: there is no official Gentoo ebuild that works in general.
My bugreport link.
Even though I fixed the bug (by adding 2 lines into official pycuda-2013.1.1.ebuild), Gentoo developers don't hurry to repair the ebuild.
The fixed ebuild is here