Comment 3 for bug 1907290

Has this issue been raised with upstream horizon?

Due to the new pip resolver, conflicts between constraints and requirements cause a build failure. One option would be to lock down the upstream horizon source to a particular SHA and apply a source patch that updates the requirements.txt to override the requirement:
https://opendev.org/openstack/horizon/src/commit/6f0200032d5fb26784c0ce1428ae0cad84ef058f/requirements.txt#L15

This could be done with SOURCE_PATCHES added to the stx-horizon.stable_docker_image directives file, similar to the DOCKER_PATCHES done in:
https://opendev.org/starlingx/oidc-auth-armada-app/src/branch/master/dex/centos/dex.stable_docker_image