these 2 derivations will be built:
  /nix/store/8c7m7xfnbymiiva4qw4gwxshym0069l6-dawn_3_91a.tgz.drv
  /nix/store/hailahqsxg8v4cf32mi1a1cjsyq5dj7l-dawn-3.91a.drv
these 2 paths will be fetched (2.6 MiB download, 10.2 MiB unpacked):
  /nix/store/2caxyippx4yz646pm0ncga45xa8ahk4j-tcl-8.6.11
  /nix/store/lzrcaknwm38avz73gsifvvq41qyyvrsk-tk-8.6.11