We have a placeholder egg that contains no code and only exists for the sake of pulling down a list of dependent packages from our PyPi repository.
Most of these dependent packages are platform-agnostic, however some are only used on Win32 platforms.
Is it possible to somehow make the dependency platform-conditional, so that a given dependency in my install_requires list will only get pulled down when installing on Win32?
Alternatively: Is it possible to specify a list of optional dependencies, that will be installed if available, but will not cause easy_install to fail if they are not?