this derivation will be built:
  /nix/store/1rr6g5kawpmx402h76q7r2xsqm31m3qq-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/1rr6g5kawpmx402h76q7r2xsqm31m3qq-bcachefs-module-7.0.0-39-generic.drv'...