Testing in Ubuntu MATE 16.04. Updated to version 0.5.2ubuntu11.2 from xenial-proposed.
$ UPDATE_MANAGER_FORCE_BACKEND_SYNAPTIC=1 apturl apt://gnome-calculator
All good, the package is installed successfully.
Testing in Ubuntu MATE 16.04. Updated to version 0.5.2ubuntu11.2 from xenial-proposed.
$ UPDATE_ MANAGER_ FORCE_BACKEND_ SYNAPTIC= 1 apturl apt://gnome- calculator
All good, the package is installed successfully.