this derivation will be built:
  /nix/store/ndsy78na1g3j3rck45s2bs1563xc8l98-gastown-1.2.1.drv
these 2 paths will be fetched (567.3 KiB download, 1.6 MiB unpacked):
  /nix/store/4icpwjifiak16vrdlgmjxlmicq0756p4-libutempter-1.2.3
  /nix/store/rib5b2gl6srpph7irp6scpjir8l7hxj0-tmux-3.7c