these 4 derivations will be built:
  /nix/store/19bs8zl0x6dzz2xbwqxq28dq14azzclc-vendor-cargo-deps.drv
  /nix/store/ppwchi40j5w8ws7rw04hx59sck1716qq-source.drv
  /nix/store/qgc84gl9y56kbbf8nk228axc2x3ffizx-tribuchet-deps-0.1.0.drv
  /nix/store/ynkiab9b8mhv9qrrqfn6qh891lgp53yw-tribuchet-0.1.0.drv