I’m trying to run pants export and I’m getting the error: “<urlopen error _ssl.c1114 the handshake operation timed out>” … “ExportError: Failed to write mutable virtualvenv for … to dist/export…” I’m running in isolated network maybe it’s related ?

For the export operation to succeed, it needs to download the wheels etc. So you do need network access...

isn’t it the same like generate-lockfiles? I change the pypi repos and generate-lockfiles works for me

Last time this happened to me, it was because of networking issues. I don't know how to fix your specific problem, but I used

curl

and

pants --pex-verbosity=9 --print-stacktrace -ldebug --keep-sandboxes=always

to debug mine. I hope this works for you?