root@Omega-AE5F:~/mreiff.space/OctoPrint-1.0.0# pip install -r requirements.txt

Collecting flask==0.9 (from -r requirements.txt (line 1))
  Using cached Flask-0.9.tar.gz
    Error [Errno 12] Out of memory while executing command python setup.py egg_info
Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/site-packages/pip/commands/install.py", line 299, in run
    requirement_set.prepare_files(finder)
  File "/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 370, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 601, in _prepare_file
    abstract_dist.prep_for_dist()
  File "/usr/lib/python2.7/site-packages/pip/req/req_set.py", line 127, in prep_for_dist
    self.req_to_install.run_egg_info()
  File "/usr/lib/python2.7/site-packages/pip/req/req_install.py", line 425, in run_egg_info
    command_desc='python setup.py egg_info')
  File "/usr/lib/python2.7/site-packages/pip/utils/__init__.py", line 678, in call_subprocess
    cwd=cwd, env=env)
  File "/usr/lib/python2.7/subprocess.py", line 390, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 916, in _execute_child
    self.pid = os.fork()
OSError: [Errno 12] Out of memory
You are using pip version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
root@Omega-AE5F:~/