these 2 derivations will be built:
  /nix/store/js87x7p2l02hii2dm62q1qnw91c476rp-dawncut-1.54a.tar.gz.drv
  /nix/store/a0j24yrpwghwqfdp361agp0jw2zi19b8-dawncut-1.54a.drv