this derivation will be built:
  /nix/store/vw470n88vi1sqh2zscdis107ygrdh7qn-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/vw470n88vi1sqh2zscdis107ygrdh7qn-bcachefs-module-7.0.0-39-generic.drv'...