-M4_FILES = $(wildcard *.m4)
-LYM4_FILES = $(wildcard *.lym4)
-EXTRA_DIST_FILES += $(M4_FILES) $(LYM4_FILES)
+ILY_FILES = $(call src-wildcard,*.ily)
+M4_FILES = $(call src-wildcard,*.m4)
+LYM4_FILES = $(call src-wildcard,*.lym4)
+EXTRA_DIST_FILES += $(M4_FILES) $(LYM4_FILES)