It is impossible to pass custom template folder to ivigenerator using QFACE_FORMAT

# Add all templates of the generator format as dependency
QFACE_TEMPLATE_PWD = $$IVI_GENERATOR_PATH/templates_$${QFACE_FORMAT}
exists($$QFACE_TEMPLATE_PWD) {
    qface_sources.depends += $$files($${QFACE_TEMPLATE_PWD}/*)
} else {
    error("Invalid QFACE_FORMAT: Couldn't find the template folder: $$QFACE_TEMPLATE_PWD")
}