pip install fails on NetBSD/amd64

[gdt]

I created a venv and tried to install the flasher.

$ virtualenv-3.10 meshtastic-venv
$ bin/pip install meshtastic-flasher

which led to

meshtastic-flasher 2.0.2 depends on pyside6

but I didn't see an attempt to build pyside6 from source. I was expecting this to be more or less like esptool so this seems surprising. (I'm not super expert with pip install, but I have built Home Assistant which depends on things in C and Fortran.)