Git subtree not fetched?

[Weathercold]

After adding my repo to NUR in nix-community/NUR#661, I checked nur-search, but didn’t find my repo. After some investigation, I found that lib/haumea, which I included in my repo as a git subtree, is missing. This causes evaluation to fail, as seen in https://github.com/nix-community/NUR/actions/runs/7918558368/job/21617462976#step:4:812.

[Mic92]

Do the normal nix fetchers fetch subtrees?
We should mirror the behavior of those.

[Weathercold]

Not sure about NUR's internal logic, but the fetcher used should be pkgs.fetchzip. When I manually fetch https://github.com/Weathercold/nixfiles/archive/2f0d550f4fffb74d88fa33dea9998ba02f65dcde.zip, the subtree is there. Weird