Cannot resolve linux environment

This is happening on Linux builds since yesterday eve:

conda.exceptions.UnsatisfiableError: The following specifications were found to be in conflict:
  - bob-devel=2018.07.06 -> libstdcxx-ng==7.2.0=hdf63c60_3
  - libstdcxx-ng[version='>=7.3.0']

Full log: https://gitlab.idiap.ch/bob/bob.ip.hed/-/jobs/146792

I wonder if there is something we can do to conda_build_config.yaml or bob-devel to fix it?