One more build fix

Signed-off-by: falkTX <falktx@falktx.com>

source/backend/utils/Makefile

@@ -36,7 +36,7 @@ LIBS += $(MODULEDIR)/juce_data_structures.a
 LIBS += $(MODULEDIR)/juce_events.a
 LIBS += $(MODULEDIR)/juce_graphics.a
 LIBS += $(MODULEDIR)/juce_gui_basics.a
-ifeq ($(MACOS),true)
+ifeq ($(USING_JUCE_GUI_EXTRA),true)
 LIBS += $(MODULEDIR)/juce_gui_extra.a
 endif
 endif
@@ -60,7 +60,7 @@ LINK_FLAGS += $(JUCE_DATA_STRUCTURES_LIBS)
 LINK_FLAGS += $(JUCE_EVENTS_LIBS)
 LINK_FLAGS += $(JUCE_GRAPHICS_LIBS)
 LINK_FLAGS += $(JUCE_GUI_BASICS_LIBS)
-ifeq ($(MACOS),true)
+ifeq ($(USING_JUCE_GUI_EXTRA),true)
 LINK_FLAGS += $(JUCE_GUI_EXTRA_LIBS)
 endif
 endif