this derivation will be built:
  /nix/store/c4z1pq2g2l53blh2wkygsljksjai6vlz-bcachefs-module-7.0.0-29-generic.drv
building '/nix/store/c4z1pq2g2l53blh2wkygsljksjai6vlz-bcachefs-module-7.0.0-29-generic.drv'...