-# empty
-TELY_FILES := $(wildcard *.tely)
-ITELY_FILES := $(wildcard *.itely)
-ITEXI_FILES := $(wildcard *.itexi)
+# rules for directories with LilyPond files.
+
+TELY_FILES := $(call src-wildcard,*.tely)
+TEXI_FILES_FROM_TELY := $(TELY_FILES:%.tely=$(outdir)/%.texi) $(TEXI_FILES_FROM_TELY)
+
+OMF_FILES += $(foreach format, html pdf, $(foreach f, $(TELY_FILES), $(outdir)/$(f:.tely=.$(format)).omf))
+
+ITELY_FILES := $(call src-wildcard,*.itely)
+ITEXI_FILES := $(call src-wildcard,*.itexi)
+LY_FILES := $(call src-wildcard,*.ly)
+ILY_FILES := $(call src-wildcard,*.ily)