Collecting cpu_cores==0.1.0
  1 location(s) to search for versions of cpu-cores:
  * https://pypi.python.org/simple/cpu-cores/
  Getting page https://pypi.python.org/simple/cpu-cores/
  Analyzing links from page https://pypi.python.org/simple/cpu-cores/
    Found link https://pypi.python.org/packages/07/bc/cf2fbf0cd77c5ece4c7e6a73b7137754904bd177f2c283968bb0d07db382/cpu_cores-0.1.1.tar.gz#md5=48c276f83d6c1a24656010b781ec01dc (from https://pypi.python.org/simple/cpu-cores/), version: 0.1.1
    Found link https://pypi.python.org/packages/6a/80/3f8f3a8e4512e9a583a9487c53e795d67df96f25526df814c35716babff8/cpu_cores-0.1.2.tar.gz#md5=d1d560cc18849c604c45d6172b18a4cd (from https://pypi.python.org/simple/cpu-cores/), version: 0.1.2
    Found link https://pypi.python.org/packages/cc/13/94c5150a0516562e2a5810ace708cc3712f5b2d66388ad25230a859fa196/cpu_cores-0.1.3.tar.gz#md5=1f7d2b40e85eb8b5cafcd6849ec457b3 (from https://pypi.python.org/simple/cpu-cores/), version: 0.1.3
    Found link https://pypi.python.org/packages/d2/be/0bfb0997b0cbd4904591e32f0f5fb12a6f9645a4a6693ea56b4902add540/cpu_cores-0.1.0.tar.gz#md5=721409823ec8fcf33fb0fc582937ce09 (from https://pypi.python.org/simple/cpu-cores/), version: 0.1.0
  Using version 0.1.0 (newest of versions: 0.1.0)
  Downloading cpu_cores-0.1.0.tar.gz
  Downloading from URL https://pypi.python.org/packages/d2/be/0bfb0997b0cbd4904591e32f0f5fb12a6f9645a4a6693ea56b4902add540/cpu_cores-0.1.0.tar.gz#md5=721409823ec8fcf33fb0fc582937ce09 (from https://pypi.python.org/simple/cpu-cores/)
  Running setup.py (path:/tmp/pip-build-sy5oucc5/cpu-cores/setup.py) egg_info for package cpu-cores
    Running command python setup.py egg_info
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-sy5oucc5/cpu-cores/setup.py", line 17, in <module>
        with open('pip-requirements.txt') as reqs:
    FileNotFoundError: [Errno 2] No such file or directory: 'pip-requirements.txt'
Cleaning up...
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-sy5oucc5/cpu-cores/
Exception information:
Traceback (most recent call last):
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/commands/wheel.py", line 199, in run
    if not wb.build():
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/req/req_set.py", line 634, in _prepare_file
    abstract_dist.prep_for_dist()
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/req/req_set.py", line 129, in prep_for_dist
    self.req_to_install.run_egg_info()
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/req/req_install.py", line 439, in run_egg_info
    command_desc='python setup.py egg_info')
  File "/home/piwheels/.local/lib/python3.5/site-packages/pip/utils/__init__.py", line 707, in call_subprocess
    % (command_desc, proc.returncode, cwd))
pip.exceptions.InstallationError: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-sy5oucc5/cpu-cores/