Scons is not only a tool, it's also a python library. However, the
modules are installed in ~/.nix-profile/lib/scons-${version} -- not in
python's "site-packages" directory -- so python won't find the library
without further help. Maybe there should be a symlink in nix-profile? I
guess there should, but I didn't know how to write that into the
expression.
svn path=/nixpkgs/trunk/; revision=12157
bc4f5932ad