Index: lxqt-panel-0.9.0/CMakeLists.txt
===================================================================
--- lxqt-panel-0.9.0.orig/CMakeLists.txt
+++ lxqt-panel-0.9.0/CMakeLists.txt
@@ -163,6 +163,9 @@ endif()
 
 setByDefault(SHOWDESKTOP_PLUGIN Yes)
 if(SHOWDESKTOP_PLUGIN)
+    find_package(ECM 1.0.0 REQUIRED NO_MODULE)
+    set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR} ${CMAKE_MODULE_PATH})
+    find_package(XCB REQUIRED COMPONENTS XCB)
     set(ENABLED_PLUGINS ${ENABLED_PLUGINS} "Show Desktop")
     add_subdirectory(plugin-showdesktop)
 endif()
Index: lxqt-panel-0.9.0/plugin-showdesktop/CMakeLists.txt
===================================================================
--- lxqt-panel-0.9.0.orig/plugin-showdesktop/CMakeLists.txt
+++ lxqt-panel-0.9.0/plugin-showdesktop/CMakeLists.txt
@@ -16,6 +16,7 @@ set(LIBRARIES
     ${LIBRARIES}
     ${LXQT_GLOBALKEYS_LIBRARIES}
     ${QTXDG_LIBRARIES}
+    XCB::XCB
 )
 
 BUILD_LXQT_PLUGIN(${PLUGIN})