these 2 derivations will be built:
  /nix/store/f9djfp9hd9ljfhlwlw1ycfwwlpj2gy0r-flake-inputs.drv
  /nix/store/z2vp3q7fz6fi6chyfqm5r9yzv04qcriz-check-flake-inputs.drv