these 3 derivations will be built:
  /nix/store/2l26rrq89msbl961s51vch2szimvfiy7-clan-cli-source.drv
  /nix/store/3x9kan6nqwszc5mkw29ck98nx187994k-clan-cli.drv
  /nix/store/j36rjczz67cyxk2z6r3p400mkmq03l9k-nix-shell.drv