Install fails v5.1.10 - Linux 64 - Ubuntu

[Will]

I downloaded the full installer for VirtuabBox, debian distro Linux 64bit.

The package manager reports an "unsatisfiable Dependency" on QT Core:

Error: Dependency is not satisfiable: libqt5core5a (>=5.6.0-beta)

I have scanned the debian repositories. Sure enough there is No Stable package available to support this installer package.

I don't know what using the in-test version might be on my other stable system programs.

Package libqt5core5a

    wheezy-backports (libs): Qt 5 core module
    5.3.2+dfsg-4+deb8u1~bpo70+1: amd64
    jessie (stable) (libs): Qt 5 core module
    5.3.2+dfsg-4+deb8u1: amd64
    stretch (testing) (libs): Qt 5 core module
    5.7.1~20161021+dfsg-6: amd64
    sid (unstable) (libs): Qt 5 core module
    5.7.1~20161021+dfsg-6: amd64
}}

I suggest it is infeasible to use this version of virtualbox on a stable system.  It might be OK for a test system or development system.  I had a mismatch of GTK versions one time and it caused all kinds of chaos with the GUI.  I don't recommend the experience.