Hi, I'm trying to do something similar to the custom egg building in the tutorial, http://www.buildout.org/docs/tutorial.html?highlight=location#custom-egg- building I have the following files: setup.py ********* from setuptools import setup, find_packages setup( name='myproject', version='3.3.0', packages=find_packages('src'), package_dir = {'': 'src'}, include_package_data = True, install_requires=['setuptools', 'numpy', 'ScientificPython'], zip_safe = False, ) buildout.cfg ************* [buildout] parts = numpy ScientificPython mypy [numpy] recipe = zc.recipe.egg find-links = http://sunet.dl.sourceforge.net/sourceforge/numpy/numpy-1.3.0.tar.gz eggs= numpy [ScientificPython] recipe = zc.recipe.egg:custom egg=ScientificPython find-links = http://sourcesup.cru.fr/frs/download.php/2372/ScientificPython-2.9.0.tar.gz include-dirs = ${numpy:location}/numpy/core/include [mypy] recipe = zc.recipe.egg:script eggs = numpy ScientificPython interpreter = python ------------ The ScientificPython package need some header files located in the numpy package/egg. I get an error when using ${numpy:location} Error: Referenced option does not exist: numpy location When I use the absolute path to the include dir it works. What am I doing wrong? Best regards, Svenn.