⟫ sudo apt-get install kde-style-qtcurve-qt5=1.8.18+git20160320-3d8622c-3build1~4
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libpay2 pay-service pay-ui ubuntu-push-client
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  libgsettings-qt1 libkf5declarative-data libkf5declarative5 libqmenumodel0 libqt5contacts5 libqt5core5a libqt5dbus5 libqt5designer5 libqt5gui5 libqt5help5
  libqt5multimedia5 libqt5multimedia5-plugins libqt5network5 libqt5opengl5 libqt5organizer5 libqt5positioning5 libqt5printsupport5 libqt5qml5 libqt5quick5
  libqt5quicktest5 libqt5quickwidgets5 libqt5script5 libqt5sensors5 libqt5sql5 libqt5sql5-mysql libqt5sql5-sqlite libqt5svg5 libqt5waylandclient5
  libqt5waylandcompositor5 libqt5webkit5 libqt5widgets5 libqt5xml5 libqt5xmlpatterns5 libubuntugestures5 libubuntumetrics5 libubuntutoolkit5 python3-pyqt5
  qmenumodel-qml qml-module-qtgraphicaleffects qml-module-qtqml-models2 qml-module-qtqml-statemachine qml-module-qtquick-controls qml-module-qtquick-dialogs
  qml-module-qtquick-layouts qml-module-qtquick-privatewidgets qml-module-qtquick-window2 qml-module-qtquick-xmllistmodel qml-module-qtquick2 qml-module-qttest
  qml-module-qtwebkit qml-module-ubuntu-components qml-module-ubuntu-components-labs qml-module-ubuntu-layouts qml-module-ubuntu-web qmlscene
  qt5-gtk-platformtheme qtdeclarative5-dev-tools qtdeclarative5-gsettings1.0 qtdeclarative5-qtmir-plugin qtdeclarative5-ubuntu-ui-toolkit-plugin qtmir-desktop
  qttools5-dev-tools qtubuntu-desktop qtwayland5 ubuntu-ui-toolkit-theme unity8 unity8-common unity8-private webapp-container webbrowser-app
Suggested packages:
  gtk2-engines-qtcurve qt5-qmltooling-plugins python3-pyqt5-dbg unity-scope-mediascanner2
The following NEW packages will be installed:
  libqt5waylandcompositor5 qt5-gtk-platformtheme
The following packages will be upgraded:
  libgsettings-qt1 libkf5declarative-data libkf5declarative5 libqmenumodel0 libqt5contacts5 libqt5core5a libqt5dbus5 libqt5designer5 libqt5gui5 libqt5help5
  libqt5multimedia5 libqt5multimedia5-plugins libqt5network5 libqt5opengl5 libqt5organizer5 libqt5positioning5 libqt5printsupport5 libqt5qml5 libqt5quick5
  libqt5quicktest5 libqt5quickwidgets5 libqt5script5 libqt5sensors5 libqt5sql5 libqt5sql5-mysql libqt5sql5-sqlite libqt5svg5 libqt5waylandclient5 libqt5webkit5
  libqt5widgets5 libqt5xml5 libqt5xmlpatterns5 libubuntugestures5 libubuntumetrics5 libubuntutoolkit5 python3-pyqt5 qmenumodel-qml qml-module-qtgraphicaleffects
  qml-module-qtqml-models2 qml-module-qtqml-statemachine qml-module-qtquick-controls qml-module-qtquick-dialogs qml-module-qtquick-layouts
  qml-module-qtquick-privatewidgets qml-module-qtquick-window2 qml-module-qtquick-xmllistmodel qml-module-qtquick2 qml-module-qttest qml-module-qtwebkit
  qml-module-ubuntu-components qml-module-ubuntu-components-labs qml-module-ubuntu-layouts qml-module-ubuntu-web qmlscene qtdeclarative5-dev-tools
  qtdeclarative5-gsettings1.0 qtdeclarative5-qtmir-plugin qtdeclarative5-ubuntu-ui-toolkit-plugin qtmir-desktop qttools5-dev-tools qtubuntu-desktop qtwayland5
  ubuntu-ui-toolkit-theme unity8 unity8-common unity8-private webapp-container webbrowser-app
The following packages will be DOWNGRADED:
  kde-style-qtcurve-qt5
68 upgraded, 2 newly installed, 1 downgraded, 0 to remove and 80 not upgraded.
Need to get 38.6 MB of archives.
After this operation, 2,811 kB of additional disk space will be used.
Do you want to continue? [Y/n] n