$ docker-compose exec console ssh -o StrictHostKeyChecking=no -i tests/fixtures/ssh/key -T -vvv git@github.com
Traceback (most recent call last):
  File "/usr/bin/docker-compose", line 11, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/compose/cli/main.py", line 71, in main
    command()
  File "/usr/lib/python2.7/site-packages/compose/cli/main.py", line 124, in perform_command
    handler(command, command_options)
  File "/usr/lib/python2.7/site-packages/compose/cli/main.py", line 467, in exec_command
    pty.start()
  File "/usr/lib/python2.7/site-packages/dockerpty/pty.py", line 338, in start
    io.set_blocking(pump, flag)
  File "/usr/lib/python2.7/site-packages/dockerpty/io.py", line 32, in set_blocking
    old_flag = fcntl.fcntl(fd, fcntl.F_GETFL)
ValueError: file descriptor cannot be a negative integer (-1)