diff --git a/ext/io/console/depend b/ext/io/console/depend
index 9e6eb60fbc..2ec922a4fb 100644
--- a/ext/io/console/depend
+++ b/ext/io/console/depend
@@ -8,12 +8,12 @@ $(OBJS): $(HDRS) $(ruby_headers) \
 
 win32_vk.inc: win32_vk.list
 
-{$(srcdir)}.list.inc:
+.list.inc:
 	gperf --ignore-case -E -C -P -p -j1 -i 1 -g -o -t -K ofs -N console_win32_vk -k* --output-file=$(@F) $<
 
 .SUFFIXES: .chksum .list
 
-{$(srcdir)}.list.chksum:
+.list.chksum:
 	@$(RUBY) -I$(top_srcdir)/tool -rchecksum \
 	    -e "Checksum.update(ARGV) {|k|k.copy(k.target) rescue k.make(k.target)}" \
 	    -- --make=$(MAKE) -I$(srcdir) $(<F) $(@F:.chksum=.inc)