Install latest/stable of nightmayr-qgnomeplatform-qt5-2204
Ubuntu 16.04 or later?
Make sure snap support is enabled in your Desktop store.
Install using the command line
sudo snap install nightmayr-qgnomeplatform-qt5-2204
Don't have snapd? Get set up for snaps.
QGnomePlatform is a Qt Platform Theme designed to use as many of the GNOME settings as possible in unmodified Qt applications. It allows Qt applications to fit into the environment as well as possible.
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Choose your Linux distribution to get detailed installation instructions. If yours is not shown, get more details on the installing snapd documentation.