this derivation will be built: /nix/store/qp6li95i3s7xwcha1k7ys6qi6ww21cpx-bcachefs-module-7.0.0-39-generic.drv building '/nix/store/qp6li95i3s7xwcha1k7ys6qi6ww21cpx-bcachefs-module-7.0.0-39-generic.drv'...