Hi Aaron,, sorry for the delay getting back......I've reinstalled ubuntu 20.04, followed your guidance, and get the following: Downloading astroscrappy-1.1.0.tar.gz (368 kB) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 368.5/368.5 kB 4.4 MB/s eta 0:00:00 Installing build dependencies ... done Getting requirements to build wheel ... error error: subprocess-exited-with-error × Getting requirements to build wheel did not run successfully. │ exit code: -4 ╰─> [0 lines of output] [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. error: subprocess-exited-with-error × Getting requirements to build wheel did not run successfully. │ exit code: -4 ╰─> See above for output. note: This error originates from a subprocess, and is likely not a problem with pip. The script exited abnormally, please try to run again... Hopefully you've got an idea....... cheers TerryRead More...