I am running Jessie x86 with amd64 as a foreign architecture.I want to replace python3 with python3:amd64 but I get a dependency on dh-python:amd64 which is not satisfied. dh-python is marked as all architectures and is installed. So it appears that dh-python all architectures is not being seen as satisfying dh-python:amd64.
(I know I may have to replace python as well but that's not my problem). Any ideas?