Flathub Buildbot ARM64 Builds failing with SSL connection timeout?

I’m seeing builds failing with “SSL connection timeout” while downloading sources. AMD64 builds fine.

One of my recent builds is available here.

The arm64 build shows Failed to download sources: module python-setuptools_scm: SSL connection timeout, while the amd64 build shows success in downloading the package.

Any ideas on if there’s some special flag I need for arm64 builds?