Help making a flake (for Geant4 (particle physics framework) examples)

This seems to be it: nix/src/nix/run.md at 1b578255245e2e1347059ad7d9171cf822c723a8 · NixOS/nix · GitHub

At present, the answer seems to be ‘no’.

At present, the answer seems to be ‘none at all’.