these 4 derivations will be built:
  /nix/store/a3nqxk9rby0clw4igk7p90b6ivk39d8z-crate-icalendar-0.17.16.tar.gz.drv
  /nix/store/a4lk8bgr5xx3l2y4wvg6yz137435nkn7-icalendar-0.17.16.drv
  /nix/store/j2pzvq7ja1gv8pyxakxm51vnarnfvk7a-cargo-vendor-dir.drv
  /nix/store/qw89mq6012zf45vpr3kzl1k4i66x1rnp-citiesapp-frontend.drv