The second workaround does not work with apt-get; e.g.:
The following packages have unmet dependencies:
libglu1-mesa-dev : Conflicts: libglu1-mesa-dev:i386 but 9.0.0-2 is to be installed
libglu1-mesa-dev:i386 : Conflicts: libglu1-mesa-dev but 9.0.0-2 is to be installed
E: Unable to correct problems, you have held broken packages.
The second workaround does not work with apt-get; e.g.:
The following packages have unmet dependencies: mesa-dev: i386 but 9.0.0-2 is to be installed mesa-dev: i386 : Conflicts: libglu1-mesa-dev but 9.0.0-2 is to be installed
libglu1-mesa-dev : Conflicts: libglu1-
libglu1-
E: Unable to correct problems, you have held broken packages.