this derivation will be built:
  /nix/store/vjqax4css279wjbxd3hl7b5a8mh8n6gn-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/vjqax4css279wjbxd3hl7b5a8mh8n6gn-bcachefs-module-7.0.0-39-generic.drv'...