From: https://github.com/calf-studio-gear/calf/pull/384

From 4f6adaa9bea90bfceaca02334a1a9f1642016444 Mon Sep 17 00:00:00 2001
From: Johannes Lorenz <j.git@lorenz-ho.me>
Date: Fri, 16 May 2025 20:54:44 +0200
Subject: [PATCH] Fix #383: Only install lv2gui if Lv2 *and* GUI are set

--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -121,7 +121,7 @@ endif()
 install(TARGETS ${PROJECT_NAME}
         LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}
         ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME})
-if(USE_GUI)
+if(USE_LV2 AND USE_GUI)
     install(TARGETS ${PROJECT_NAME}lv2gui DESTINATION ${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME})
 endif()