Why can I not install pyenv?

Question

Problem:

I am using python 2.7 on my Windows 10 computer.

When I run

pip install pyenv

I get the error shown below.

This is the only pip module that I have run into that I cannot install successfully. I'm not sure why this happens. Any ideas?

Error Message:

pip install pyenv
Collecting pyenv
  Downloading pyenv-20150113.1.tar.gz
Building wheels for collected packages: pyenv
  Running setup.py bdist_wheel for pyenv: started

  Running setup.py bdist_wheel for pyenv: finished with status 'error'
  Complete output from command c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\\u                                               sers\\user\\appdata\\local\\temp\\pip-build-_6j2tq\\pyenv\\setup.py';f=getattr(tokenize, 'open', open                                               )(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_w                                               heel -d c:\users\user\appdata\local\temp\tmprb9n7epip-wheel- --python-tag cp27:
  running bdist_wheel
  running build
  installing to build\bdist.win32\wheel
  running install
  Cloning into 'C:/Users/user/.pyenv'...
  Cloning into 'C:/Users/user/.pyenv/plugins/pyenv-doctor'...
  Cloning into 'C:/Users/user/.pyenv/plugins/pyenv-installer'...
  Cloning into 'C:/Users/user/.pyenv/plugins/pyenv-pip-rehash'...
  Cloning into 'C:/Users/user/.pyenv/plugins/pyenv-update'...
  Cloning into 'C:/Users/user/.pyenv/plugins/pyenv-virtualenv'...
  Cloning into 'C:/Users/user/.pyenv/plugins/pyenv-which-ext'...

  WARNING: seems you still have not added 'pyenv' to the load path.

  # Load pyenv automatically by adding
  # the following to your profile:

  export PATH="$HOME/.pyenv/bin:$PATH"
  eval "$(pyenv init -)"
  eval "$(pyenv virtualenv-init -)"

  Traceback (most recent call last):
    File "<string>", line 1, in <module>
    File "c:\users\user\appdata\local\temp\pip-build-_6j2tq\pyenv\setup.py", line 33, in <module>
      cmdclass=dict(install=PyenvInstall),
    File "c:\python27\lib\distutils\core.py", line 151, in setup
      dist.run_commands()
    File "c:\python27\lib\distutils\dist.py", line 953, in run_commands
      self.run_command(cmd)
    File "c:\python27\lib\distutils\dist.py", line 972, in run_command
      cmd_obj.run()
    File "c:\python27\lib\site-packages\wheel\bdist_wheel.py", line 257, in run
      self.distinfo_dir)
    File "c:\python27\lib\site-packages\wheel\bdist_wheel.py", line 393, in egg2dist
      raise ValueError(err)
  ValueError: Egg metadata expected at build\bdist.win32\wheel\.\pyenv-20150113.1-py2.7.egg-info but not                                                found

  ----------------------------------------
  Failed building wheel for pyenv
  Running setup.py clean for pyenv
Failed to build pyenv
Installing collected packages: pyenv
  Running setup.py install for pyenv: started
    Running setup.py install for pyenv: finished with status 'error'
    Complete output from command c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\                                               \users\\user\\appdata\\local\\temp\\pip-build-_6j2tq\\pyenv\\setup.py';f=getattr(tokenize, 'open', op                                               en)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" insta                                               ll --record c:\users\user\appdata\local\temp\pip-wjwco5-record\install-record.txt --single-version-ex                                               ternally-managed --compile:
    usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
       or: -c --help [cmd1 cmd2 ...]
       or: -c --help-commands
       or: -c cmd --help

    error: option --single-version-externally-managed not recognized

    ----------------------------------------
Command "c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\user\\appdata                                               \\local\\temp\\pip-build-_6j2tq\\pyenv\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.rea                                               d().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\mse                                               dmon\appdata\local\temp\pip-wjwco5-record\install-record.txt --single-version-externally-managed --compi                                               le" failed with error code 1 in c:\users\user\appdata\local\temp\pip-build-_6j2tq\pyenv\

Answer 1

The "pypi" page of pyvenv mentions:

The PyPi support is not tested by many users yet, so the direct way ist still recommended if you want to play it safe.

The authors of the package recommend to use their dedicated installation script.