I'm trying to trigger a job configured to accept a file parameter named dist.
Triggering this job works fine from the Jenkins web UI and curl (if I provide user:token credentials).
POSTing to /buildByToken/buildWithParameters?token=... with the same form data triggers a build, but no matter what I try the file isn't passed on to the job.

Works:

curl -X POST "https://.../job/.../build?token=..." \
--user user:api-token \
-F file0=@$(shell pwd)/dist.json \
-F json='{"parameter": [{"name": "dist", "file": "file0"}]}'

Doesn't work:

curl -X POST "https://.../buildByToken/buildWithParameters?job=job&token=..." \
-F file0=@$(shell pwd)/dist.json \
-F json='{"parameter": [{"name": "dist", "file": "file0"}]}'

The issue might be related to the fact that Jenkins seemed to ignore the file when I POSTed to /buildWithParameters, it only worked when posting to /build.

Thanks in advance!