Travis CI Python 2.6: ImportError: No module named _md5

[Ryan J Ollos]

$ if [ "$TRAVIS_OS_NAME" = osx ]; then
    test -d $HOME/venv-lib || mkdir $HOME/venv-lib
    eval "$(pyenv init -)"
    pyver_latest="$(pyenv install -l | grep -E "^[ ]*${pyver/./\\.}\.[0-9]+$" | tail -1 | tr -d '[:blank:]')"
    venv="$HOME/venv-$pyver_latest"
    pyenv install --skip-existing $pyver_latest
    pyenv shell $pyver_latest
    pip install --upgrade virtualenv
    python -m virtualenv $venv
    source $venv/bin/activate
  fi
  
Traceback (most recent call last):
  File "/Users/travis/.pyenv/versions/2.6.9/bin/pip", line 7, in <module>
    from pip import main
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/pip/__init__.py", line 21, in <module>
    from pip._vendor.urllib3.exceptions import DependencyWarning
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/pip/_vendor/urllib3/__init__.py", line 8, in <module>
    from .connectionpool import (
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/pip/_vendor/urllib3/connectionpool.py", line 29, in <module>
    from .connection import (
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/pip/_vendor/urllib3/connection.py", line 39, in <module>
    from .util.ssl_ import (
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/pip/_vendor/urllib3/util/__init__.py", line 6, in <module>
    from .ssl_ import (
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/pip/_vendor/urllib3/util/ssl_.py", line 7, in <module>
    from hashlib import md5, sha1, sha256
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5
New python executable in /Users/travis/venv-2.6.9/bin/python
Installing setuptools<37, pip, wheel<0.30...
  Complete output from command /Users/travis/venv-2.6.9/bin/python - setuptools<37 pip wheel<0.30:
  Traceback (most recent call last):
  File "<stdin>", line 11, in <module>
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv_support/pip-9.0.3-py2.py3-none-any.whl/pip/__init__.py", line 21, in <module>
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv_support/pip-9.0.3-py2.py3-none-any.whl/pip/_vendor/urllib3/__init__.py", line 8, in <module>
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv_support/pip-9.0.3-py2.py3-none-any.whl/pip/_vendor/urllib3/connectionpool.py", line 29, in <module>
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv_support/pip-9.0.3-py2.py3-none-any.whl/pip/_vendor/urllib3/connection.py", line 39, in <module>
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv_support/pip-9.0.3-py2.py3-none-any.whl/pip/_vendor/urllib3/util/__init__.py", line 6, in <module>
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv_support/pip-9.0.3-py2.py3-none-any.whl/pip/_vendor/urllib3/util/ssl_.py", line 7, in <module>
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5
----------------------------------------
...Installing setuptools<37, pip, wheel<0.30...done.
Traceback (most recent call last):
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/runpy.py", line 122, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/runpy.py", line 34, in _run_code
    exec code in run_globals
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv.py", line 2349, in <module>
    main()
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv.py", line 712, in main
    symlink=options.symlink)
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv.py", line 953, in create_environment
    download=download,
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv.py", line 904, in install_wheel
    call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
  File "/Users/travis/.pyenv/versions/2.6.9/lib/python2.6/site-packages/virtualenv.py", line 796, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /Users/travis/venv-2.6.9/bin/python - setuptools<37 pip wheel<0.30 failed with error code 1
/Users/travis/.travis/functions: line 118: /Users/travis/venv-2.6.9/bin/activate: No such file or directory
The command "if [ "$TRAVIS_OS_NAME" = osx ]; then
    test -d $HOME/venv-lib || mkdir $HOME/venv-lib
    eval "$(pyenv init -)"
    pyver_latest="$(pyenv install -l | grep -E "^[ ]*${pyver/./\\.}\.[0-9]+$" | tail -1 | tr -d '[:blank:]')"
    venv="$HOME/venv-$pyver_latest"
    pyenv install --skip-existing $pyver_latest
    pyenv shell $pyver_latest
    pip install --upgrade virtualenv
    python -m virtualenv $venv
    source $venv/bin/activate
  fi
  " failed and exited with 1 during .
Your build has been stopped.