Comment 3 for bug 1185896

It's unclear to me exactly what's going wrong here, but the fact that multiarch-support:arm64 is being considered by the resolver seems wrong, when the native arch is amd64 and the foreign arch is armhf. Should it not be filtered out?

Should this package even appear in the apt cache? (maybe that is OK - the package file was downloaded)

This simpler command also makes apt install the correct things:
apt-get install crossbuild-essential-armhf multiarch-support

attached is the debug output from running that in case it helps.