these 3 derivations will be built:
  /nix/store/v3gwcs9l6kg1h8krjq9pm3l11ar2rx0p-nix-util-test-support-2.36.0pre.drv
  /nix/store/jdyljjxvyxpavrcskykn9bhq23mvzw4p-nix-expr-tests-2.36.0pre.drv
  /nix/store/qz81jq3k9d92ls2m970rl0znbvgg3nzq-nix-expr-tests-run.drv