this derivation will be built:
  /nix/store/r9saih4i9w4sf1aw9sn52zzz90j7lbr7-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/r9saih4i9w4sf1aw9sn52zzz90j7lbr7-bcachefs-module-7.0.0-39-generic.drv'...