diff --git a/Makefile b/Makefile
index fb25e9d8..b9ad1cf0 100644
--- a/Makefile
+++ b/Makefile
@@ -169,6 +169,7 @@ $(BIN)/w6a_ww: selfhost/cmd/w6a/main.ww selfhost/cmd/w6a/opcodes.ww \
 		selfhost/cmd/w6a/lex.ww selfhost/cmd/w6a/parse.ww \
 		selfhost/cmd/w6a/asm.ww selfhost/cmd/w6a/obj.ww \
 		lib/os/os.ww lib/rt/malloc.ww lib/time/time.ww \
+		lib/strings/strings.ww lib/bytes/bytes.ww lib/encoding/utf8/utf8.ww \
 		$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
 		$(LIB)/libwwrt.a | $(BIN)
 	@mkdir -p $(BIN)/w6a_ww.d
@@ -185,6 +186,7 @@ $(BIN)/w6l_ww: selfhost/cmd/w6l/main.ww selfhost/cmd/w6l/sym.ww \
 		selfhost/cmd/w6l/pass.ww selfhost/cmd/w6l/dynout.ww \
 		selfhost/cmd/w6l/out.ww \
 		lib/os/os.ww lib/rt/malloc.ww lib/time/time.ww \
+		lib/strings/strings.ww lib/bytes/bytes.ww lib/encoding/utf8/utf8.ww \
 		$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
 		$(LIB)/libwwrt.a | $(BIN)
 	@mkdir -p $(BIN)/w6l_ww.d
@@ -198,6 +200,7 @@ $(BIN)/w6l_ww: selfhost/cmd/w6l/main.ww selfhost/cmd/w6l/sym.ww \
 # w6c/w6a/w6l like the C driver.
 $(BIN)/ww_ww: selfhost/cmd/ww/main.ww lib/os/os.ww lib/rt/malloc.ww \
 		lib/time/time.ww lib/strconv/strconv.ww \
+		lib/strings/strings.ww lib/bytes/bytes.ww lib/encoding/utf8/utf8.ww \
 		$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
 		$(LIB)/libwwrt.a | $(BIN)
 	@mkdir -p $(BIN)/ww_ww.d