In Debian and possibly other distributions, qsb (qt6-shader-baker) is
not in the default path, but in a QT6 specific path. Search there too
Applied changes from Nirbheek
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6095>
subdir_done()
endif
-qsb = find_program('qsb-qt6', 'qsb', required: qt6_option)
+qt6_bindir = qt6qml_dep.get_variable('bindir', configtool: 'QT_HOST_BINS')
+qsb = find_program('qsb-qt6', 'qsb', dirs: [qt6_bindir], required: qt6_option)
if not qsb.found()
subdir_done()
endif