these 2 derivations will be built:
  /nix/store/c3mbq0bqkr8mgv2mj4jw4r1ll0b5v8f6-flake-inputs.drv
  /nix/store/q1g9nl6d31qc72nf7xqwpav8hk09p4gf-check-flake-inputs.drv