these 2 derivations will be built:
  /nix/store/n17nvjlzyrxgbks4gk0q0bv0x1wjx4hb-coco-1.2.18+192728.aa2238062732.drv
  /nix/store/3xpgb6z22d7xlwfpyq4bxqsvgvpz0m6i-check-coco.drv