this derivation will be built:
  /nix/store/r71lb90a78imp155g3gfqbmqqrskiqzn-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/r71lb90a78imp155g3gfqbmqqrskiqzn-bcachefs-module-7.0.0-31-generic.drv'...