Defined in /home/build/jenkins/workspace/RockBootstrap19/FLAVOR/next/label/DebianUnstable/dev/autoproj/remotes/orocos.toolchain/orocos.osdeps and /home/build/jenkins/workspace/RockBootstrap19/FLAVOR/next/label/DebianUnstable/dev/autoproj/remotes/rock/rock.osdeps as

doxygen:
    debian,ubuntu: doxygen
      gentoo: app-doc/doxygen
      fedora: doxygen