these 3 derivations will be built:
  /nix/store/a9v3nx091sq82zzk8gm1q62cba8may32-clan-cli-source.drv
  /nix/store/4lq925mxqvsrrhqvxiss46mbcxri559g-clan-cli.drv
  /nix/store/v7wkppxr47l8sdp8l5p5yacy94rl2i79-nix-shell.drv