these 2 derivations will be built:
  /nix/store/r01xx2s7r25f8rr6i5h2qp3nqfmfcmd3-flake-inputs.drv
  /nix/store/wq2flzl0bx2nqgsid0s8f77kqabcbk9p-check-flake-inputs.drv