sudo apt-get install libkf5notifications-data libkf5notifications-dev qml-module-qtquick2 qml-module-qtquick-controls2 qml-module-qtquick-controls qml-module-qtwebsockets qml-module-qt-websockets qtdeclarative5-qtquick2-plugin qtdeclarative5-models-plugin cmake cmake-extras cmake-data qml-module-qtquick-layouts libkf5plasma-dev extra-cmake-modules qtdeclarative5-dev build-essential g++ gettext -y
E: Unable to locate package qml-module-qtquick-controls2
E: Unable to locate package libkf5plasma-dev
what needs to be done??