--- a/font/Makefile
+++ b/font/Makefile
@@ -247,7 +247,7 @@
 # as a baseline.  Remove the Plane 1 Copyleft glyph from the Plane 0
 # set of hex files.
 #
-coverage:
+coverage: hex
 	grep -v "^01F12F" $(COMPILED_DIR)/unifont_csur_lower-$(VERSION).hex \
 	   > $(COMPILED_DIR)/unifont_all-$(VERSION).hex
 	sort plane0[1-E]/*.hex plane0Fcsur/*.hex | grep -v "^0020:" \