title: cx_freeze no based named 'Win32GUI' error when creating a EXE
body: <p>I want to convert a application into an executable file and have use cx_freeze for that purpose.
  But i got this Error-Message:</p>
  <pre><code>......executable.py, line 86, in base
  raise ConfigError(f&quot;no base named {name!r}&quot;)
  cx_Freeze.exception.ConfigError: no base named 'Win32GUI'
  </code></pre>
  <p>Versions: Win 10 Home (x64); Python 3.9.6; Cx_Freeze 6.8; PyQt - 5.15.4;</p>
  <p>It's strange because some time ago this code worked without problem?!</p>
  <pre><code>import sys
  from cx_Freeze import setup, Executable
  
  try:
      from cx_Freeze.hooks import get_qt_plugins_paths
  except ImportError:
      include_files = []
  else:
      # Inclusion of extra plugins (new in cx_Freeze 6.8b2)
      # cx_Freeze imports automatically the following plugins depending of the
      # use of some modules:
      # imageformats - QtGui
      # platforms - QtGui
      # mediaservice - QtMultimedia
      # printsupport - QtPrintSupport
      #
      # So, &quot;platforms&quot; is used here for demonstration purposes.
      include_files = get_qt_plugins_paths(&quot;PyQt5&quot;, &quot;platforms&quot;)
     
  
  # base=&quot;Win32GUI&quot; should be used only for Windows GUI app
  base = None
  if sys.platform == &quot;win32&quot;:
      base = &quot;Win32GUI&quot;
  
  build_exe_options = {
      &quot;excludes&quot;: [&quot;&quot;],
      &quot;include_files&quot;: include_files,
  }
  
  bdist_mac_options = {
      &quot;bundle_name&quot;: &quot;Test&quot;,
  }
  
  bdist_dmg_options = {
      &quot;volume_label&quot;: &quot;TEST&quot;,
  }
  
  executables = [Executable(&quot;main.py&quot;, base=base, target_name=&quot;TESTS&quot;)]
  
  setup(
      name=&quot;simple_PyQt5&quot;,
      version=&quot;0.3&quot;,
      description=&quot;Sample cx_Freeze PyQt5 script&quot;,
      options={
          &quot;build_exe&quot;: build_exe_options,
          &quot;bdist_mac&quot;: bdist_mac_options,
          &quot;bdist_dmg&quot;: bdist_dmg_options,
      },
      executables=executables,
  )
  </code></pre>