Error running cmake in unvanquished

gistfile1.txt

01:51:59 git:(upstream ⚡ detached@a4fa831) ~/src/Unvanquished/build$ cmake ..
-- client
-- server
-- ttyclient
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named 'yaml'
CMake Error at daemon/cmake/DaemonCBSE.cmake:55 (message):
  Missing dependences for CBSE generation.  Please ensure you have python ≥
  2, python-yaml, and python-jinja installed.

                               Use pip -r install src/utils/cbse/requirements.txt to install
Call Stack (most recent call first):
  CMakeLists.txt:88 (CBSE)


-- Configuring incomplete, errors occurred!
See also "/Users/eliribble/src/Unvanquished/build/CMakeFiles/CMakeOutput.log".
See also "/Users/eliribble/src/Unvanquished/build/CMakeFiles/CMakeError.log".