these 4 derivations will be built:
  /nix/store/bdfb3vqz51y0rynyjjidib5dgf3yn8r7-fracjson-wrapper.drv
  /nix/store/r4zdma7g6sjrpf1vlh3p3mv6l3ggld83-treefmt.toml.drv
  /nix/store/riv4rs50pillfbb178ayl72qjza91rrq-examples.drv
  /nix/store/9ayy32i21l8cnmglgvq6pnjvqc6si1ys-test-examples.drv