このpython2エラーは何を意味し、どうすればよいですか？

python2（gnome-tweak-tool、bzrなど）に関連するアプリケーションを使用しようとするたびに起動に失敗し、コマンドラインで実行すると次のエラーが発生します。

    [username@host ~]$ gnome-tweak-tool
Traceback (most recent call last):
  File "/usr/lib/python2.7/site.py", line 563, in <module>
    main()
  File "/usr/lib/python2.7/site.py", line 545, in main
    known_paths = addusersitepackages(known_paths)
  File "/usr/lib/python2.7/site.py", line 278, in addusersitepackages
    user_site = getusersitepackages()
  File "/usr/lib/python2.7/site.py", line 253, in getusersitepackages
    user_base = getuserbase() # this will also set USER_BASE
  File "/usr/lib/python2.7/site.py", line 243, in getuserbase
    USER_BASE = get_config_var('userbase')
  File "/usr/lib/python2.7/sysconfig.py", line 520, in get_config_var
    return get_config_vars().get(name)
  File "/usr/lib/python2.7/sysconfig.py", line 419, in get_config_vars
    _init_posix(_CONFIG_VARS)
  File "/usr/lib/python2.7/sysconfig.py", line 287, in _init_posix
    raise IOError(msg)
IOError: invalid Python installation: unable to open /usr/bin/lib/python2.7/config/Makefile (No such file or directory)

に投稿しましたアクベントしかし、私はArch Linuxを使用しているので、ここに属すると聞きました。 python2の出力：

    [username@host ~]$ python2
Traceback (most recent call last):
  File "/usr/lib/python2.7/site.py", line 563, in <module>
    main()
  File "/usr/lib/python2.7/site.py", line 545, in main
    known_paths = addusersitepackages(known_paths)
  File "/usr/lib/python2.7/site.py", line 278, in addusersitepackages
    user_site = getusersitepackages()
  File "/usr/lib/python2.7/site.py", line 253, in getusersitepackages
    user_base = getuserbase() # this will also set USER_BASE
  File "/usr/lib/python2.7/site.py", line 243, in getuserbase
    USER_BASE = get_config_var('userbase')
  File "/usr/lib/python2.7/sysconfig.py", line 520, in get_config_var
    return get_config_vars().get(name)
  File "/usr/lib/python2.7/sysconfig.py", line 419, in get_config_vars
    _init_posix(_CONFIG_VARS)
  File "/usr/lib/python2.7/sysconfig.py", line 287, in _init_posix
    raise IOError(msg)
IOError: invalid Python installation: unable to open /usr/bin/lib/python2.7/config/Makefile (No such file or directory)