these 2 derivations will be built:
  /nix/store/c51d1mplifwv42siw3fvm79waf7fjdy3-cargo-vendor-dir.drv
  /nix/store/7l9vqlrh3xsz62y9i3dpij5x4fq3bxbf-citiesapp-frontend.drv
building '/nix/store/c51d1mplifwv42siw3fvm79waf7fjdy3-cargo-vendor-dir.drv'
cargo-vendor-dir> structuredAttrs is enabled
building '/nix/store/7l9vqlrh3xsz62y9i3dpij5x4fq3bxbf-citiesapp-frontend.drv'
citiesapp-frontend> Running phase: unpackPhase
citiesapp-frontend> unpacking source archive /nix/store/pv3l046hdp8m1ayr1b016g2ypm8a1y6d-wky6ap5lxxbnqsr97r87s9pxgybkx3rb-source
citiesapp-frontend> source root is wky6ap5lxxbnqsr97r87s9pxgybkx3rb-source
citiesapp-frontend> Executing cargoSetupPostUnpackHook