this derivation will be built:
  /nix/store/qqa5qsp29hmy718gyq3dsfq72sb74dh2-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/qqa5qsp29hmy718gyq3dsfq72sb74dh2-bcachefs-module-7.0.0-38-generic.drv'...