diff --git a/unix/mkfile.regexp b/unix/mkfile.regexp
index 8683422..792c622 100644
--- a/unix/mkfile.regexp
+++ b/unix/mkfile.regexp
@@ -9,43 +9,15 @@
 	regexp9.h\
 	regcomp.h\
 	lib9.h\
-	`{ls -p $PLAN9/src/libregexp/*.c}\
+	`{9 ls -p $PLAN9/src/libregexp/*.c}\
 
-all:V: $TARG
+WHAT=regexp
 
-%: $PLAN9/include/%
-	cp $prereq $target
+<../mkfile.what
 
 %: $PLAN9/src/libregexp/%
 	cp $prereq $target
 
-%: $PLAN9/man/man1/%
-	cp $prereq $target
-
-%: $PLAN9/man/man3/%
-	cp $prereq $target
-
-%: $PLAN9/man/man7/%
-	cp $prereq $target
-
-regexp9.3: $PLAN9/man/man3/regexp.3
-	cp $prereq $target
-
-regexp9.7: $PLAN9/man/man7/regexp.7
-	cp $prereq $target
-
-%: ../make/%
-	cp $prereq $target
-
-Makefile:D: ../make/Makefile.TOP ../make/Makefile.regexp ../make/Makefile.LIB ../make/Makefile.BOT
-	cat $prereq >$target
-
-README: ../README
-	cp $prereq $target
-
-NOTICE: ../NOTICE.regexp
-	cp $prereq $target
-
 lib9.h: $PLAN9/src/libregexp/lib9.std.h
 	cp $prereq $target