I would love to try the player but something went funny on the install

jbs@eyesonly:~$ cd exaile && ./exaile
Traceback (most recent call last):
File "exaile.py", line 28, in ?
from xl import *
File "/home/jbs/exaile/xl/tracks.py", line 18, in ?
import common, media
File "/home/jbs/exaile/xl/media.py", line 21, in ?
import pygst
ImportError: No module named pygst
jbs@eyesonly:~/exaile$