catkin build stuck on rospack failure

edit

POST EDIT

I'm installing on El Capitan (os x 10.11.1) and it appears that a lot of people are having issues with this version of os x without a solution. In my scouring the web I've found a handful other people running into the same issues.

ORIGINAL

$ catkin build -DCMAKE_BUILD_TYPE=Release

fails with:

...
[python_orocos_kdl] ==> '/Users/Jackson/ros_catkin_ws/build/python_orocos_kdl/build_env.sh /usr/bin/make --jobserver-fds=3,4 -j' in '/Users/Jackson/ros_catkin_ws/build/python_orocos_kdl'
[ 10%] Building CXX object CMakeFiles/python_module_PyKDL.dir/PyKDL/sipPyKDLpart0.o
In file included from /Users/Jackson/ros_catkin_ws/build/python_orocos_kdl/PyKDL/sipPyKDLpart0.cpp:7:
In file included from /Users/Jackson/ros_catkin_ws/build/python_orocos_kdl/PyKDL/sipAPIPyKDL.h:11:
/usr/local/include/sip.h:32:10: fatal error: 'Python.h' file not found
#include <Python.h>
         ^
[ 20%] Building CXX object CMakeFiles/python_module_PyKDL.dir/PyKDL/sipPyKDLpart1.o
In file included from /Users/Jackson/ros_catkin_ws/build/python_orocos_kdl/PyKDL/sipPyKDLpart1.cpp:7:
In file included from /Users/Jackson/ros_catkin_ws/build/python_orocos_kdl/PyKDL/sipAPIPyKDL.h:11:
/usr/local/include/sip.h:32:10: fatal error: 'Python.h' file not found
#include <Python.h>
         ^
1 error generated.
make[2]: *** [CMakeFiles/python_module_PyKDL.dir/PyKDL/sipPyKDLpart0.o] Error 1
make[2]: *** Waiting for unfinished jobs....
1 error generated.
make[2]: *** [CMakeFiles/python_module_PyKDL.dir/PyKDL/sipPyKDLpart1.o] Error 1
make[1]: *** [CMakeFiles/python_module_PyKDL.dir/all] Error 2
make: *** [all] Error 2
[python_orocos_kdl] <== '/Users/Jackson/ros_catkin_ws/build/python_orocos_kdl/build_env.sh /usr/bin/make --jobserver-fds=3,4 -j' failed with return code '2'

Finished <== visualization_tutorials          [ 1.3 seconds ]                   
Starting ==> rospack                                                            
Finished <== viz                              [ 1.3 seconds ]                   
Starting ==> rostime                                                            
Finished <== gencpp                           [ 1.3 seconds ]                   
Starting ==> xmlrpcpp                                                           
Finished <== geneus                           [ 1.3 seconds ]                   
Starting ==> pr2_description                                                    
Failed   <== python_orocos_kdl                [ 1.6 seconds ]                   
Finished <== genlisp                          [ 1.2 seconds ]                   
Finished <== genpy                            [ 1.3 seconds ]                   
Finished <== class_loader                     [ 1.4 seconds ]                   

[rospack] ==> '/Users/Jackson/ros_catkin_ws/build/rospack/build_env.sh /usr/bin/make --jobserver-fds=3,4 -j' in '/Users/Jackson/ros_catkin_ws/build/rospack'
make[2]: *** No rule to make target `/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib', needed by `/Users/Jackson/ros_catkin_ws/devel/lib/librospack.dylib'.  Stop.
make[2]: *** Waiting for unfinished jobs....
[ 11%] Building CXX object CMakeFiles/rospack.dir/src/rospack.cpp.o
/Users/Jackson/ros_catkin_ws/src/rospack/src/rospack.cpp:72:10: fatal error: 'Python.h' file not found
#include <Python.h>
         ^
1 error generated.
make[2]: *** [CMakeFiles/rospack.dir/src/rospack.cpp.o] Error 1
make[1]: *** [CMakeFiles/rospack.dir/all] Error 2
make: *** [all] Error 2
[rospack] <== '/Users/Jackson/ros_catkin_ws/build/rospack/build_env.sh /usr/bin/make --jobserver-fds=3,4 -j' failed with return code '2'

Finished <== rostime                          [ 1.3 seconds ]                   
Finished <== xmlrpcpp                         [ 1.2 seconds ]                   
Finished <== pr2_description                  [ 2.7 seconds ]                   
Failed   <== rospack                          [ 3.3 seconds ]                   
[build] Runtime: 23.2 seconds 
Traceback (most recent call last):
  File "/usr/local/bin/catkin", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python2.7/site-packages/catkin_tools/commands/catkin.py", line 219, in main
    sys.exit(args.main(args) or 0)
  File "/usr ...