Building ROS on Fedora 15

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I am trying to build ROS on Fedora 15, and I get an error with rosmake:

Detected ros_comm bootstrapping it too.
  File "/home/user/ros/ros/bin/rosmake", line 46
    print "Rospack failed to build" 
                                  ^
SyntaxError: invalid syntax

When I looked into the issue, this is invalid syntax in 3.0 or higher, but I'm running 2.7. If I make my default python 3.2, then rosinstall doesn't even run:

Traceback (most recent call last):
  File "/usr/bin/rosinstall", line 4, in <module>
    import pkg_resources
ImportError: No module named pkg_resources

Is this a Fedora issue? Is this a python issue? How can I solve this?