this derivation will be built:
  /nix/store/cakn1yhlpwh0lfp0p47vgnrbidnfdii4-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/cakn1yhlpwh0lfp0p47vgnrbidnfdii4-bcachefs-module-7.0.0-39-generic.drv'...