if __name__ == "__main__"

installer

@@ -129,9 +129,9 @@ def copy(source_dir, dest_dir):
     copytree(source_dir, dest_dir, symlinks=True, ignore=ignore, ignore_dangling_symlinks=False)
 
 
+if __name__ == '__main__':
     os.makedirs(prefix, exist_ok=True)
 
-
     for directory in directories:
         print('Copying directory {}'.format(directory))
         os.chdir(directory)