private function addPHPFiles(Phar $phar)
    {
        $finder = new Finder();
        $finder
            ->files()
            ->ignoreVCS(true)
            ->name('*.php')
            ->notName('Compiler.php')
            ->in(realpath(__DIR__.'/../../src'));

        foreach ($finder as $file) {
            $this->addFile($phar, $file);
        }

        return $this;
    }