these 4 derivations will be built:
  /nix/store/3zzq68havdbs9byd1g6cpw2ss81czzaw-crate-rss-2.1.1.tar.gz.drv
  /nix/store/mw10igniffdk1h1lavn85987al73fxmc-rss-2.1.1.drv
  /nix/store/hkackj3kskg37vxdma6v1y9kkqvdjsfb-cargo-vendor-dir.drv
  /nix/store/d2pgwid29qpw74bifzn1pczqqgp5s7dc-citiesapp-frontend.drv