these 2 derivations will be built:
  /nix/store/4kqyjyka1cc0hmpilk5483c6y2jl65qs-amp-linux-x64.drv
  /nix/store/5m85xcjx5rlchan9pg02w2dcgsbiz6hx-amp-0.0.1789689675-g7fec46.drv