Set output name after the variable is defined

CMakeLists.txt

@@ -663,10 +663,6 @@ else()
 	endif()
 endif()
 
-if (FLATPAK)
-	set_target_properties(nheko PROPERTIES OUTPUT_NAME "${APPID}")
-endif()
-
 if(APPLE)
 	target_link_libraries (nheko PRIVATE Qt5::MacExtras)
 elseif(WIN32)
@@ -762,6 +758,7 @@ set_target_properties(nheko PROPERTIES CMAKE_SKIP_INSTALL_RPATH TRUE)
 if(UNIX AND NOT APPLE)
 	if(FLATPAK)
 		set(APPID "io.github.NhekoReborn.Nheko")
+		set_target_properties(nheko PROPERTIES OUTPUT_NAME "${APPID}")
 	else()
 		set(APPID "nheko")
 	endif()