Failing to start mopidy on Arch Linux

Hi there,

I’m rebuilding my Arch Linux install from scratch. When I try to use pacman to install mopidy, I get the following error. I tried doing this with pip2 install mopidy as well. Any advice on what might be going wrong?

orion% pacaur -S mopidy
resolving dependencies...
looking for conflicting packages...

Packages (1) mopidy-2.0.0-2

Total Installed Size:  9.20 MiB

:: Proceed with installation? [Y/n] y
(1/1) checking keys in keyring                                                                                                                 [########################################################################################] 100%
(1/1) checking package integrity                                                                                                               [########################################################################################] 100%
(1/1) loading package files                                                                                                                    [########################################################################################] 100%
(1/1) checking for file conflicts                                                                                                              [########################################################################################] 100%
(1/1) checking available disk space                                                                                                            [########################################################################################] 100%
:: Processing package changes...
(1/1) installing mopidy                                                                                                                        [########################################################################################] 100%
It's adviced to change the ownership of /var/lib/mopidy to mopidy:mopidy.
Otherwise some mopidy addons might not work.
Optional dependencies for mopidy
    mopidy-spotify: Spotify backend
    mopidy-scrobbler: Last.FM scrobbler
    mopidy-mopify: Web client with Spotify-inspired interface
    mopidy-soundcloud: Soundcloud backend
:: Running post-transaction hooks...
(1/2) Updating manpage index...
(2/2) Updating the desktop file MIME type cache...
orion% mopidy
Traceback (most recent call last):
  File "/usr/bin/mopidy", line 9, in <module>
    load_entry_point('Mopidy==2.0.0', 'console_scripts', 'mopidy')()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 542, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2569, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2229, in load
    return self.resolve()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2235, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/site-packages/mopidy/__main__.py", line 8, in <module>
    from mopidy.internal.gi import Gst  # noqa: Import to initialize
  File "/usr/lib/python2.7/site-packages/mopidy/internal/gi.py", line 9, in <module>
    gi.require_version('Gst', '1.0')
AttributeError: 'module' object has no attribute 'require_version'

Anyone able to help me with this?