these 2 derivations will be built:
  /nix/store/i7ydp1kkl2b63rjshp992jqdpndp6hzy-eca-native-linux-amd64.zip.drv
  /nix/store/v9v14804nm94z46bf3g6zprvzffsv5yn-eca-0.157.2.drv