title: bug in installing pyinstaller
body: <p>So I tried the <code>pip install pyinstaller</code> command and thats what happened:</p>
  <p>So I had this bug:</p>
  <pre><code>Collecting pyinstaller
    Using cached pyinstaller-4.1.tar.gz (3.5 MB)
    Installing build dependencies ... done
    Getting requirements to build wheel ... done
      Preparing wheel metadata ... error
      ERROR: Command errored out with exit status 1:
       command: 'c:\users\aris\onedrive\υπολογιστής\python\python.exe' 'c:\users\aris\onedrive\υπολογιστής\python\lib\site-packages\pip\_vendor\pep517\_in_process.py' prepare_metadata_for_build_wheel 'C:\Users\aris\AppData\Local\Temp\tmp_o2ged7z'
           cwd: C:\Users\aris\AppData\Local\Temp\pip-install-ipo7dr00\pyinstaller_7b00b43eae9b4a19be431faa4f4cf9f4
      Complete output (38 lines):
      Error in sitecustomize; set PYTHONVERBOSE for traceback:
      SyntaxError: (unicode error) 'utf-8' codec can't decode byte 0xf5 in position 0: invalid start byte (sitecustomize.py, line 7)
      running dist_info
      creating C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info
      writing C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\PKG-INFO
      writing dependency_links to C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\dependency_links.txt
      writing entry points to C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\entry_points.txt
      writing requirements to C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\requires.txt
      writing top-level names to C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\top_level.txt
      writing manifest file 'C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\SOURCES.txt'
      reading manifest file 'C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\SOURCES.txt'
      reading manifest template 'MANIFEST.in'
      warning: no files found matching 'pyinstaller-gui.py'
      no previously-included directories found matching 'bootloader\build'
      no previously-included directories found matching 'bootloader\.waf-*'
      no previously-included directories found matching 'bootloader\.waf3-*'
      no previously-included directories found matching 'bootloader\waf-*'
      no previously-included directories found matching 'bootloader\waf3-*'
      no previously-included directories found matching 'bootloader\_sdks'
      no previously-included directories found matching 'bootloader\.vagrant'
      warning: no previously-included files found matching 'bootloader\.lock-waf*'
      no previously-included directories found matching 'doc\source'
      no previously-included directories found matching 'doc\_build'
      warning: no previously-included files matching '*.tmp' found under directory 'doc'
      warning: no files found matching 'news\_template.rst'
      no previously-included directories found matching 'news'
      no previously-included directories found matching 'old'
      no previously-included directories found matching 'scripts'
      no previously-included directories found matching 'tests\scripts'
      no previously-included directories found matching '.github'
      warning: no previously-included files found matching '.*'
      warning: no previously-included files found matching '*.yml'
      warning: no previously-included files found matching '*~'
      warning: no previously-included files found matching '.directory'
      warning: no previously-included files matching '*.py[co]' found anywhere in distribution
      writing manifest file 'C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.egg-info\SOURCES.txt'
      creating 'C:\Users\aris\AppData\Local\Temp\pip-modern-metadata-tgdlk_61\pyinstaller.dist-info'
      error: invalid command 'bdist_wheel'
      ----------------------------------------
  ERROR: Command errored out with exit status 1: 'c:\users\aris\onedrive\υπολογιστής\python\python.exe' 'c:\users\aris\onedrive\υπολογιστής\python\lib\site-packages\pip\_vendor\pep517\_in_process.py' prepare_metadata_for_build_wheel 'C:\Users\aris\AppData\Local\Temp\tmp_o2ged7z' Check the logs for full command output.
  </code></pre>
  <p>Does anyone know how I can solve it??</p>