these 2 derivations will be built:
  /nix/store/6s8z8mml0wn2qlz94l7xn2xpk2lrqy4s-flake-inputs.drv
  /nix/store/3ajlas74jxmaxinmq7f8lqbbgfmg7d3g-check-flake-inputs.drv