Please add the following packages: dev-python/matplotlib dev-python/numpy dev-python/pytz dev-python/python-dateutil media-fonts/ttf-bitstream-vera numpy-1.2.0 and pytz-2008a are in prefix tree, but please keyword ~x86-macos. numpy needs to be modified to handle non-existence of gcc by default. Other packages seem working by just ecopying them.
Created attachment 168034 [details, diff] patch for numpy-1.2.0.ebuild avoid gcc flag check if there isn't (eg there's only gcc-apple)
thx. we modified your postinst patch abit. done.