jenkins stem ci jobs are missing some dependencies

Do the stem CI jobs on jenkins need these missing dependencies to run the full suite of tests?

stem-ci-linux and stem-tor-ci are missing cryptography, pynacl, and pycodestyle:

18:52:27   stem version...                                      1.7.0-dev
18:52:27   python version...                                    2.7.9
18:52:27   operating system version...                          Linux (debian 8.11)
18:52:27   cryptography version...                              missing
18:52:27   pynacl version...                                    missing
18:52:27   mock version...                                      1.0.1
18:52:27   pyflakes version...                                  0.8.1
18:52:27   pycodestyle version...                               missing
18:52:27   checking for orphaned .pyc files...                  done (0.0s)
18:52:27   checking for unused tests...                         done (0.0s)
18:52:27   importing test modules...                            done (0.2s)
18:52:27   running pyflakes...                                  running
18:52:27   running pycodestyle...                               unavailable

https://jenkins.torproject.org/job/stem-ci-linux/lastBuild/ARCHITECTURE=amd64,SUITE=jessie/console