I don't know what flatpack even is so I'm not sure. I know srb2bld has support for compiling rphys on other systems but you'll still need the rphys.pk3 asset file from the windows version zip.
I don't know what flatpack even is so I'm not sure. I know srb2bld has support for compiling rphys on other systems but you'll still need the rphys.pk3 asset file from the windows version zip.