this derivation will be built:
  /nix/store/hhm441cd5ij7l1s3dyzv8q87imglr71i-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/hhm441cd5ij7l1s3dyzv8q87imglr71i-bcachefs-module-7.0.0-31-generic.drv'...