these 2 derivations will be built:
  /nix/store/810srqb680vjs2scac2wgkiw92dpfqxw-happy-coder-1.2.6.drv
  /nix/store/p8ahrdlkcy4n013yfpbldrg9swfwh71a-check-happy-coder.drv
this path will be fetched (8.3 MiB download, 86.9 MiB unpacked):
  /nix/store/cr388qkg86iakp5r0a7hfbjkf0ldgp3h-difftastic-0.72.0