these 2 derivations will be built:
  /nix/store/na4jirlgamlrhac21rc71m42f8wyxx2k-letta-code-src-with-lock.drv
  /nix/store/l9z1vfhnfnwlwgbvabiiyrwpni7pdh6v-letta-code-0.31.7.drv