$ pkg-config --print-errors Qt5UiTools
Package Qt5UiPlugin was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5UiPlugin.pc' to the PKG_CONFIG_PATH environment variable
Package 'Qt5UiPlugin', required by 'Qt5UiTools', not found
$ pkg-config --print-errors Qt5UiTools
Package Qt5UiPlugin was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5UiPlugin.pc' to the PKG_CONFIG_PATH environment variable
Package 'Qt5UiPlugin', required by 'Qt5UiTools', not found
No package appears to provide Qt5UiPlugin.pc