diff --git a/setperm/GNUmakefile b/setperm/GNUmakefile
index 1f2afa0..d474ae1 100644
--- a/setperm/GNUmakefile
+++ b/setperm/GNUmakefile
@@ -4,4 +4,9 @@ clean:
 	rm setperm
 install: $(BINDIR)/setperm
 
+GNUmakevars: GNUmakevars.sh
+	sh ./$^ > $@
+GNUmakerules: GNUmakerules.sh
+	sh ./$^ > $@
+
 include GNUmakerules
diff --git a/setperm/GNUmakerules.sh b/setperm/GNUmakerules.sh
new file mode 100755
index 0000000..e523b37
--- /dev/null
+++ b/setperm/GNUmakerules.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "\$(BINDIR)/%: %"
+echo -e "\tcp \$^ \$@"
diff --git a/setperm/GNUmakevars.sh b/setperm/GNUmakevars.sh
new file mode 100755
index 0000000..a7de4ae
--- /dev/null
+++ b/setperm/GNUmakevars.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+prefix=${prefix:-/usr/local}
+echo "BINDIR=$prefix/bin"
+echo
+echo "all:"