fontforge update for python

I found that configure didn't find the python.pc files using pkg-config without explicitly updating the PKG_CONFIG_PATH from the brew file. Sorry if this the incorrect way of going about this, no amount of adding depends_on 'python' was letting brew include python into the PKG_CONFIG_PATH.
I'm not sure I understand this; what's the actual dependency? Python is provided by OSX; is the system version insufficient?