Linelist downloader gives a cryptic error when run on secure systems

[joshua-laughner]

I encountered this error running the installation on one of my clusters:

Traceback (most recent call last):
  File "/home/laughner/ggg/ggg-stable/linelist/download_linelists.py", line 281, in <module>
    main()
  File "/home/laughner/ggg/ggg-stable/linelist/download_linelists.py", line 47, in main
    driver(**clargs)
  File "/home/laughner/ggg/ggg-stable/linelist/download_linelists.py", line 67, in driver
    failed = do_one_download(download, needs_extract)
  File "/home/laughner/ggg/ggg-stable/linelist/download_linelists.py", line 272, in do_one_download
    is_ok = check_md5(check['file'], check['md5'])
  File "/home/laughner/ggg/ggg-stable/linelist/download_linelists.py", line 87, in check_md5
    new_checksum = compute_md5(file)
  File "/home/laughner/ggg/ggg-stable/linelist/download_linelists.py", line 92, in compute_md5
    checksum = hashlib.md5()
ValueError: [digital envelope routines: EVP_DigestInit_ex] disabled for FIPS

The problem arose because I was using the system Python, which apparently has some extra precautions implemented. The simple fix was just to make sure that a conda/mamba environment with Python was active. This will need to be documented somewhere obvious in case users encounter the same problem.