The current hydrafetcher assumes that meta.json is the only build product when fetching it from Hydra. Thus, it fetches the meta.json file from the following link:

"https://hydra.vtr.tools/build/{build_num}/download/1/meta.json"

This assumption does not hold for older builds (example), since the 1 in the path could actually be a different number (in the example, 8).

This can be resolved by first fetching the build info using the Hydra API and searching for the file named meta.json.