this derivation will be built:
  /nix/store/k6crm5frhnv696w6wgn6b8xbhphf7f9c-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/k6crm5frhnv696w6wgn6b8xbhphf7f9c-bcachefs-module-7.0.0-31-generic.drv'...