Looking at the code it's clear it's only checking command line arguments.

Yeah, I know I've also already looked 🙂 But you asked to be sure if there is no existing issues so I asked here firstly

Actually I asked you to follow the process in the bug filing template...

Please bring your issue to the SCons users mailing list before filing an issue here

See: https://scons.org/bugs.html

or join our Discord server : https://discord.gg/bXVpWAy

Yeah but if nothing from the above can be really done there is "as close as possible" way should be used which is github discussions (which I saw are duplicated in discord...)

I'm not sure "why nothing above can be done?" Can you explain?

I mean I can't (primary reason) and don't want really write in discord. I don't love mailing lists. But I can ask here...