Virtualenv installation failure due to existing build file

[acolley]

OS = Windows 10
Shell = PowerShell
Python = 3.8
Version = current master HEAD: 94bb422

While installing the library into a virtualenv I encountered the following error:

PS C:\Users\alnes\dev\protoactor-python> python -m venv .venv        
PS C:\Users\alnes\dev\protoactor-python> .\.venv\Scripts\Activate.ps1
(.venv) PS C:\Users\alnes\dev\protoactor-python> pip install .               
Processing c:\users\alnes\dev\protoactor-python
Installing collected packages: ProtoActor-Python
  Running setup.py install for ProtoActor-Python ... error
    ERROR: Command errored out with exit status 1:
     command: 'c:\users\alnes\dev\protoactor-python\.venv\scripts\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\alnes\\AppData\\Local\\Temp\\pip-req-build-_pv65mo5\\setup.py'"'"'; __file__='"'"'C:\\Users\\alnes\\AppData\\Local\\Temp\\pip-req-build-_pv65mo5\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, 
'"'"'exec'"'"'))' install --record 'C:\Users\alnes\AppData\Local\Temp\pip-record-k8zzc2w7\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\alnes\dev\protoactor-python\.venv\include\site\python3.8\ProtoActor-Python'
         cwd: C:\Users\alnes\AppData\Local\Temp\pip-req-build-_pv65mo5\
    Complete output (5 lines):
    running install
    running build
    running build_py
    creating build
    error: could not create 'build': Cannot create a file when that file already exists
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\users\alnes\dev\protoactor-python\.venv\scripts\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\alnes\\AppData\\Local\\Temp\\pip-req-build-_pv65mo5\\setup.py'"'"'; __file__='"'"'C:\\Users\\alnes\\AppData\\Local\\Temp\\pip-req-build-_pv65mo5\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\alnes\AppData\Local\Temp\pip-record-k8zzc2w7\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\alnes\dev\protoactor-python\.venv\include\site\python3.8\ProtoActor-Python' Check the logs for full command output.

This appears to have been caused by the build file in the root of the repository.

I'm not sure how important this file is but after removing it the installation continues but fails due to a different error noted in another issue: #58.