import os, sys, site
if "POSY_PYTHON_PACKAGES" in os.environ:
paths = os.environ["POSY_PYTHON_PACKAGES"].split(os.pathsep)
for path in paths:
site.addsitedir(path)
else:
sys.stderr.write("This Python is managed by, and should be launched by, Posy.\n")
sys.stderr.write("Unexpected things may happen if you continue.\n")