- Add logic so extra plugins can build without installing base components.

--- src/mixer2/CMakeLists.txt.orig	2025-09-03 14:34:34 UTC
+++ src/mixer2/CMakeLists.txt
@@ -3,6 +3,7 @@ endif (${Cairo_FOUND})
 add_subdirectory (cairoblend)
 endif (${Cairo_FOUND})
 
+if (NOT BUILD_EXTRA_PLUGINS)
 add_subdirectory (addition)
 add_subdirectory (addition_alpha)
 add_subdirectory (alphaatop)
@@ -35,3 +36,4 @@ add_subdirectory (sleid0r)
 add_subdirectory (value)
 add_subdirectory (xfade0r)
 add_subdirectory (sleid0r)
+endif ()
