these 2 derivations will be built:
  /nix/store/yyhs9nryg24svj42qxcdabnrfgn9xbhj-letta-code-src-with-lock.drv
  /nix/store/k7nvl32hg91wcqzbinsigka8v4k5lvc2-letta-code-0.31.5.drv