Hello, I checked kwindowsystem's package in debian. It seems the plugins directory in kwindowsystem should be installed to /run/current-system/profile/lib/qt5/plugins rather than /run/current-system/profile/lib/plugins. Maybe this is a bug in the kwindowsystem package.
File list of package libkf5windowsystem5 in stretch of architecture amd64: (link: https://packages.debian.org/stretch/amd64/libkf5windowsystem5/filelist) #+BEGIN_EXAMPLE /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5 /usr/lib/x86_64-linux-gnu/libKF5WindowSystem.so.5.28.0 /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemWaylandPlugin.so /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so /usr/share/doc/libkf5windowsystem5/changelog.Debian.gz /usr/share/doc/libkf5windowsystem5/copyright #+END_EXAMPLE File list of kwindowsystem in guix: #+BEGIN_EXAMPLE /gnu/store/snf6dh8fprihac2y0mwspgc5lchv12b6-kwindowsystem-5.49.0/lib ├── cmake │ └── KF5WindowSystem │ ├── KF5WindowSystemConfig.cmake │ ├── KF5WindowSystemConfigVersion.cmake │ ├── KF5WindowSystemTargets.cmake │ └── KF5WindowSystemTargets-relwithdebinfo.cmake ├── libKF5WindowSystem.so -> libKF5WindowSystem.so.5 ├── libKF5WindowSystem.so.5 -> libKF5WindowSystem.so.5.49.0 ├── libKF5WindowSystem.so.5.49.0 ├── plugins │ └── kf5 │ └── org.kde.kwindowsystem.platforms │ ├── KF5WindowSystemWaylandPlugin.so │ └── KF5WindowSystemX11Plugin.so └── qt5 └── mkspecs └── modules └── qt_KWindowSystem.pri #+END_EXAMPLE -- Meiyo Peng
