IFD does not work with git deps

[Ten0]

With the following nix derivation:

          ((pkgs.callPackage "${crate2nix}/tools.nix" { }).generatedCargoNix {
            name = "proj";
            # Filter src to avoid it being too large - keep Cargo.toml/Cargo.lock and lib.rs/main.rs
            src = lib.fileset.toSource {
              root = ../..;
              fileset = lib.fileset.fromSource (lib.cleanSourceWith {
                src = ../..;
                filter = path: type: (
                  let baseName = baseNameOf (toString path);
                  in
                  (
                    (type == "directory" && baseName != "target" && baseName != "node_modules")
                    || (baseName == "Cargo.toml" || baseName == "Cargo.lock" || baseName == "lib.rs" || baseName == "main.rs")
                  ) && (lib.cleanSourceFilter path type) # + other basic filters
                );
              });
            };
            cargoToml = ".cargo/workspace/Cargo.toml";
          })

Building leads to the following error (truncated with hopefully only relevant information):

@nix { "action": "setPhase", "phase": "unpackPhase" }
Running phase: unpackPhase
unpacking source archive /nix/store/dgd0qsj7p8s8aid2mkm09ynlxl4f9x6d-source
source root is source
@nix { "action": "setPhase", "phase": "buildPhase" }
Running phase: buildPhase
++ crate2nix generate -f ./.cargo/workspace/Cargo.toml -o Cargo-generated.nix -h /nix/store/80m9cr7lmpsrxh79ql70iz763r6xs90j-proj-crate2nix/crate-hashes.json
Error: while retrieving metadata about ./.cargo/workspace/Cargo.toml: `cargo metadata` exited with an error: error: no matching package named `lightgbm-sys` found
location searched: https://github.com/Ten0/lightgbm-rs.git?branch=for_proj_main#ebc52622
required by package `lightgbm v0.2.3 (https://github.com/Ten0/lightgbm-rs.git?branch=for_proj_main#ebc52622)`
    ... which satisfies git dependency `lightgbm` (locked to 0.2.3) of package `p1 v1.0.0 (/build/source/p2/lib/p1)`
    ... which satisfies path dependency `p1` (locked to 1.0.0) of package `p2 v1.0.0 (/build/source/p2/Service)`

crate2nix failed.
== cargo/config (BEGIN)
    [source.crates-io]
    replace-with = "vendored-sources"
    
    [source."https://github.com/Ten0/lightgbm-rs.git?branch=for_proj_main#ebc5262299d75cc770e21416f9e3ef8204427fba"]
    git = "https://github.com/Ten0/lightgbm-rs.git"
    
    
    branch = "for_proj_main"
    replace-with = "vendored-sources"
    
    [source.vendored-sources]
    directory = "/nix/store/zg0br63gy3b9r67kkfzsjqzxwz79vqwk-deps"

== cargo/config (END)

== crate-hashes.json (BEGIN)
    {
      "lightgbm 0.2.3 (git+https://github.com/Ten0/lightgbm-rs.git?branch=for_proj_main#ebc5262299d75cc770e21416f9e3ef8204427fba)": "0nr42asw4sg7q7xrkg565ivl1s9b6g75kflzy9hvl3srqrnxf10z",
      "lightgbm-sys 0.3.0 (git+https://github.com/Ten0/lightgbm-rs.git?branch=for_proj_main#ebc5262299d75cc770e21416f9e3ef8204427fba)": "0nr42asw4sg7q7xrkg565ivl1s9b6g75kflzy9hvl3srqrnxf10z"
    }
== crate-hashes.json (END)

== ls -la (BEGIN)
total 24
drwxr-xr-x  24 nixbld nixbld  4096 Jan  1  1970 .
drwx------   3 nixbld nixbld    36 May  1 22:54 ..
drwxr-xr-x   3 nixbld nixbld    23 Jan  1  1970 .cargo
drwxr-xr-x  12 nixbld nixbld   173 Jan  1  1970 p2
== ls -la (END)

Contents of /nix/store/zg0br63gy3b9r67kkfzsjqzxwz79vqwk-deps:

> cd /nix/store/zg0br63gy3b9r67kkfzsjqzxwz79vqwk-deps
> find . -maxdepth 1 -name "*lightgbm*"
./hway6s5x02wwvd7jqcqikvb8gw4zmsls-lightgbm-sys-0.3.0
./j7yyjdxmv1vfk77b7a7s30rqliq8rm0k-lightgbm-0.2.3

If I do generate Cargo.nix manually via nix run github:nix-community/crate2nix -- generate -f .cargo/workspace/Cargo.toml and import that instead, it works.

Thanks for your help.