Great, thanks for that, it’s very helpful for Arch Linux users !
Interesting about requiring an AUR package for nVidia drivers. According to this, “If you have a GTX 10xx, GTX 9xx, or older card, updating breaks your graphics”.
And:
To fix this, the Arch Linux developers recommend that you first uninstall the existing NVIDIA packages: nvidia, nvidia-lts, or nvidia-dkms. Then, install nvidia-580xx-dkms, which is a community-maintained package from the Arch User Repository (AUR) that contains the old proprietary driver that works on these GPUs.
Regarding QWT, yes qwt-qt5 sounds like the right package (equivalent of libqwt-qt5-devrecommended for Ubuntu). It seems last month the maintainer split the qwt package into Qt5/Qt6 versions.
I’ve made of note of your packages in the source code (in DEPS.Linux).
In future, GPlates will switch from OpenGL to Vulkan, which will use Qt6 by default and also not require starting GPlates with QT_QPA_PLATFORM=xcb gplates.