this derivation will be built:
  /nix/store/a47gxiinsp6x5ay4qjypz219j752lkj5-nix-shell.drv
these 2 paths will be fetched (587.9 KiB download, 1.4 MiB unpacked):
  /nix/store/izvp0rszmxnl8nyifly9qcqd0qxddxnh-libutempter-1.2.3
  /nix/store/kycygkx3pwxq004y26svfhw2p12yj4rb-tmux-3.7c