Yup, a working mirror should give you
apt policy gpgv libqt5dbus5 libqt5gui5 libqt5network5 libqt5quick5 libqt5quickcontrols2-5 libqt5quicktemplates2-5 libqt5widgets5 libqt5x11extras5 qml-module-qtgraphicaleffects qml-module-qtqml-models2 qml-module-qtquick-controls qml-module-qtquick-controls2 qml-module-qtquick-dialogs qml-module-qtquick-layouts qml-module-qtquick-privatewidgets qml-module-qtquick-templates2 qml-module-qtquick-window2 qml-module-qtquick2 qt5-gtk-platformtheme
gpgv:
Installed: 2.2.5-1
Candidate: 2.2.5-1
Version table:
*** 2.2.5-1 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5dbus5:
Installed: 5.10.1+dfsg-5
Candidate: 5.10.1+dfsg-5
Version table:
*** 5.10.1+dfsg-5 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5gui5:
Installed: 5.10.1+dfsg-5
Candidate: 5.10.1+dfsg-5
Version table:
*** 5.10.1+dfsg-5 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5network5:
Installed: 5.10.1+dfsg-5
Candidate: 5.10.1+dfsg-5
Version table:
*** 5.10.1+dfsg-5 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5quick5:
Installed: 5.10.1-4
Candidate: 5.10.1-4
Version table:
*** 5.10.1-4 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5quickcontrols2-5:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5quicktemplates2-5:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5widgets5:
Installed: 5.10.1+dfsg-5
Candidate: 5.10.1+dfsg-5
Version table:
*** 5.10.1+dfsg-5 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
libqt5x11extras5:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtgraphicaleffects:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtqml-models2:
Installed: 5.10.1-4
Candidate: 5.10.1-4
Version table:
*** 5.10.1-4 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick-controls:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick-controls2:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick-dialogs:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick-layouts:
Installed: 5.10.1-4
Candidate: 5.10.1-4
Version table:
*** 5.10.1-4 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick-privatewidgets:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick-templates2:
Installed: 5.10.1-2
Candidate: 5.10.1-2
Version table:
*** 5.10.1-2 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick-window2:
Installed: 5.10.1-4
Candidate: 5.10.1-4
Version table:
*** 5.10.1-4 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qml-module-qtquick2:
Installed: 5.10.1-4
Candidate: 5.10.1-4
Version table:
*** 5.10.1-4 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
100 /var/lib/dpkg/status
qt5-gtk-platformtheme:
Installed: (none)
Candidate: 5.10.1+dfsg-5
Version table:
5.10.1+dfsg-5 500
500 http://10.10.10.3:3142/mirror.math.princeton.edu/pub/debian unstable/main amd64 Packages
01:10:0401:10 PM [piper@x1 ~]$