I have successfully built it for retropie-setup – the current build script works with the latest version – I have uploaded the latest source, so you can build it by doing the following from terminal inside RetroPie-Setup folder.
sed -i "s/vice-2.4/vice-2.4.20/g" scriptmodules/emulators/vice.sh; sudo ./retropie_packages.sh vice; git checkout scriptmodules/emulators/vice.sh
the SuperCPU enabled binary is called “xscpu64”
you could add it to /opt/retropie/configs/c64/emulators.cfg
As it has been a long time since the last non dev Vice release, it might be worth me updating our packages permanently to the latest – but please give it some testing and let me know.