Conda package resolution seems broken

Not sure when it started, but we are currently facing package resolution problems in several places.

Examples:

• https://gitlab.idiap.ch/bob/bob.learn.tensorflow/pipelines/35806
• https://gitlab.idiap.ch/bob/bob.learn.em/pipelines/35872

The only thing we noticed was a change in the patch version of conda-build.

Could this be problem?

@amohammadi: any clues?