def finalize_options(self):
        # Update build_lib settings from the build command to always put
        # build files in platform-specific subdirectories of build/, even
        # for projects with only pure-Python source (this is desirable
        # specifically for support of multiple Python version).
        build_cmd = self.get_finalized_command('build')
        platlib_dir = _get_platlib_dir(build_cmd)

        build_cmd.build_purelib = platlib_dir
        build_cmd.build_lib = platlib_dir
        self.build_lib = platlib_dir

        SetuptoolsBuildPy.finalize_options(self)

    def finalize_options(self):
        build_py.finalize_options(self)
        self.ensure_filename('rcc')
        self.ensure_filename('uic')

        if self.rcc is None:
            self.rcc = which('pyrcc4')
            if self.rcc is None:
                self.rcc = which('pyrcc')
            if self.rcc is None:
                raise RuntimeError("Error, cannot find pyrcc program")
        if self.uic is None:
            self.uic = which('pyuic4')
            if self.uic is None:
                self.uic = which('pyuic')
            if self.uic is None:
                raise RuntimeError("Error, cannot find pyuic program")

def update_package_data(distribution):
    """update package_data to catch changes during setup"""
    build_py = distribution.get_command_obj('build_py')
    # distribution.package_data = find_package_data()
    # re-init build_py options which load package_data
    build_py.finalize_options()

 def finalize_options(self):
     build.finalize_options(self)
     # The build isn't platform-independent
     if self.build_lib == self.build_purelib:
         self.build_lib = self.build_platlib

def update_package_data(distribution):
    """Modify the ``package_data`` to catch changes during setup."""
    build_py = distribution.get_command_obj("build_py")
    build_py.finalize_options()    # Updates package_data

 def finalize_options(self):
     _build_py.finalize_options(self)