these 3 derivations will be built:
  /nix/store/2asm8lqmncgg0147m12y2hh7jiqdncq1-treefmt.drv
  /nix/store/7dcbskac0xpj815adq7ip31mmn55lamf-clan-runtime.drv
  /nix/store/79jp4kxpifpknsfdwmimmwib17ghhxjr-clan.drv
this path will be fetched (3.3 MiB download, 8.9 MiB unpacked):
  /nix/store/idddmypwxb6m9kl6kxc9xk5na65yxm93-treefmt-2.6.0