diff --git a/mkfile b/mkfile
index 80df5400ff00114893a38950803b4655009d0371..ca6fee1b94e1c43798937107355506c6cc04fe0f 100644
--- a/mkfile
+++ b/mkfile
@@ -1,6 +1,18 @@
 </$objtype/mkfile
 
-run:
-    $CC $CFLAGS tree.c
-    $LD $LDFLAGS -o tree tree.$O
+RC=/rc/bin
+BIN=/$objtype/bin
+MAN=/sys/man
+
+tree:
+	$CC $CFLAGS tree.c
+	$LD $LDFLAGS -o tree tree.$O
+
+install:V:
+	mv tree $BIN/
+	cp man/1/tree $MAN/1/
+
+uninstall:V:
+	rm -f $BIN/tree
+	rm -f $MAN/1/tree