diff --git a/prwtmp/GNUmakefile b/prwtmp/GNUmakefile
index 259f83f..13aa5ba 100644
--- a/prwtmp/GNUmakefile
+++ b/prwtmp/GNUmakefile
@@ -5,12 +5,11 @@ prwtmp:
 
 install: $(ROOT)/usr/local/bin/prwtmp $(ROOT)/usr/local/man/man8/prwtmp.8
 
-install_all:
-	$(MAKE) install ROOT=/nfs/wsrdb
-	$(MAKE) install ROOT=/nfs/wsrcom
-	$(MAKE) install ROOT=/nfs/wifosv
-	$(MAKE) install ROOT=/nfs/ihssv
-	$(MAKE) install ROOT=/nfs/wsrtest
+clean:
+	rm prwtmp
+
+distclean: clean
+	rm GNUmakerules GNUmakevars
 
 $(ROOT)/usr/local/bin/%: %
 	$(INSTALL) $< $@
@@ -18,8 +17,8 @@ $(ROOT)/usr/local/bin/%: %
 $(ROOT)/usr/local/man/man8/%.8: %.man
 	$(INSTALL) $< $@
 
-clean:
-	rm prwtmp
+GNUmakevars: GNUmakevars.sh
+	sh ./$^ > $@
+GNUmakerules: GNUmakerules.pl
+	perl ./$^ > $@
 
-distclean: clean
-	rm GNUmakerules GNUmakevars
diff --git a/prwtmp/GNUmakerules.pl b/prwtmp/GNUmakerules.pl
new file mode 100644
index 0000000..8f30daa
--- /dev/null
+++ b/prwtmp/GNUmakerules.pl
@@ -0,0 +1,8 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+
+print "\$(BINDIR)/%: %\n";
+print "\tcp \$^ \$@\n";
+print "\$(MAN1DIR)/%: %\n";
+print "\tcp \$^ \$@\n";
diff --git a/prwtmp/GNUmakevars.sh b/prwtmp/GNUmakevars.sh
new file mode 100755
index 0000000..a7de4ae
--- /dev/null
+++ b/prwtmp/GNUmakevars.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+prefix=${prefix:-/usr/local}
+echo "BINDIR=$prefix/bin"
+echo
+echo "all:"