these 2 derivations will be built:
  /nix/store/6xgsc9dwqp505kc6swm3kai5255pllmd-freebuff-linux-x64.tar.gz.drv
  /nix/store/97rrh0dircr2pflw7n0sbx1g3jk23a5l-freebuff-0.0.156.drv