title: Error installing AutoitLibrary through command line
body: <p>I need to install robotframework-autoitlibrary to use on my test cases. 
  My problem is when I try to install AutoIt Library through command line with the following command:</p>
  
  <pre><code>pip install -U robotframework-autoitlibrary --no-cache-dir --pre
  </code></pre>
  
  <p>I have this error:</p>
  
  <pre><code>  C:\windows\system32&gt;pip install -U robotframework-autoitlibrary --no-cache- 
      dir --pre
      Collecting robotframework-autoitlibrary
      Downloading 
   https://files.pythonhosted.org/packages/4e/a4/9e51fe35b1da7a006b773c9c234f78e89bcc4f267152c4e9fa8260631fa8/robotframework-autoitlibrary-1.2.2.zip (701kB)
      100% |################################| 706kB 1.6MB/s
      Complete output from command python setup.py egg_info:
      Traceback (most recent call last):
        File "&lt;string&gt;", line 1, in &lt;module&gt;
        File "c:\users\user-a~1\appdata\local\temp\pip-install- 
      oro1ov\robotframework-autoitlibrary\setup.py", line 93, in &lt;module&gt;
          destPath = os.path.normpath(os.path.join(os.getenv("HOMEDRIVE"), 
      r"\RobotFramework\Extensions\AutoItLibrary"))
        File "c:\python27\lib\ntpath.py", line 65, in join
          result_drive, result_path = splitdrive(path)
        File "c:\python27\lib\ntpath.py", line 115, in splitdrive
          if len(p) &gt; 1:
      TypeError: object of type 'NoneType' has no len()
  
      ----------------------------------------
      Command "python setup.py egg_info" failed with error code 1 in 
      c:\users\user-a~1\appdata\local\temp\pip-install-oro1ov\robotframework- 
      autoitlibrary\
  </code></pre>
  
  <p>My currently installed python packages and their versions are:</p>
  
  <pre><code>Pillow==5.3.0
  Pygments==2.3.1
  pypiwin32==223
  Pypubsub==4.0.0
  pywin32==224
  robotframework==3.1
  robotframework-ride==1.5.2.1
  robotframework-selenium2library==3.0.0
  robotframework-seleniumlibrary==3.3.0
  selenium==3.141.0
  six==1.12.0
  typing==3.6.6
  urllib3==1.24.1
  wxPython==4.0.3
  </code></pre>
  
  <p>I already try this command:</p>
  
  <pre><code>pip install --upgrade setuptools
  </code></pre>
  
  <p>When input echo %HOMEDRIVE%, the output is:</p>
  
  <pre><code>C:\Users\cmpeixoto&gt;echo %HOMEDRIVE%
  C:
  </code></pre>
  
  <p>Thanks for your help,</p>