these 2 derivations will be built:
  /nix/store/i6jlsk7dna4dnmgyjlw87xl8r9ymj5sn-herdr-0.9.1-zig-deps.drv
  /nix/store/dnbq3prc1wyiv32pb4qw6bc22mlskp37-herdr-0.9.1.drv