Just tried installing it under Wine, but the installer fails immediately with the attached error message. And yes, I have tried both setting Wine as Windows 10 and Windows 11, and yes, in 64-bit.
I guess the installer's method of identifying the OS recognizes it as not being Windows for some reason. So, it *may* work under Wine if the installer allowed it. Who knows.
If the author is interested in testing QSPICE under Wine, I'll happily do that once the installer is updated to allow it.