Yep.
I didn't try with python2. At the moment it's more of an academic thing with Mint 20. Maybe once there is a point release I'll really look into it.
RIP & python3 built & passed the tests but there was an issue with the DRO characters in the back plot in Axis.
Once I've sorted out the spindle on my mill and got all the new MESA goodies hooked up I'll have another shot.
Tommy had a deb I installed for gtk2
my latest problem is not being able to find boost library for python2
(my talk of problems with python2 vrs python was a red haring)
Regarding Mint 20 & 2.8.0
Focal has libboost 1.67 but for some reason it's not being found. Which is the same version as Buster
Is the build system bound too tightly to Debian ?
Whilst Tommy's method will get you a running Linuxcnc install, trying to build either run in place or packages doesn't work.
Even installing a Debian kernel can cause problems when you want to build kernel modules, I have seen differences in gcc and other packages that cause issues. That's why I'm of the opinion to keep packages from the same eco system.
I specifically said python 2 trouble.