these 2 derivations will be built:
  /nix/store/hppxbdr2lhfmd0i0v8rj46iwymfymadc-happy-coder-1.2.6.drv
  /nix/store/jrffpprf2cgggndn316ibcp9gbjc1ylc-check-happy-coder.drv
this path will be fetched (8.5 MiB download, 86.0 MiB unpacked):
  /nix/store/g9sz3bh37hjfz625z7i3yfyad914bwym-difftastic-0.72.0