'Called before lua modules\'s install() methods.
In most cases, extensions will only need to have two lines::
luarocks(\'--tree=\' + prefix, \'install\', rock_spec_path)'

def setup_dependent_package(self, module, dependent_spec):

    module.lua = Executable(join_path(self.spec.prefix.bin, 'lua'))
    module.luarocks = Executable(join_path(self.spec.prefix.bin, 'luarocks'))
