these 4 derivations will be built:
  /nix/store/kc9cfpaplgdnx3064c04hwcp3s7g95fp-crate-http-cache-reqwest-1.0.0-alpha.8.tar.gz.drv
  /nix/store/nw6wincig65afsv4m1gs60qh7rrbghhf-http-cache-reqwest-1.0.0-alpha.8.drv
  /nix/store/pvyrh79adqr5xiichz127mrn9rzmsnw9-cargo-vendor-dir.drv
  /nix/store/5l3kqj1nb4aki533bc65rx2h0dhl6v1j-citiesapp-frontend.drv