diff -Nru vlock-1.3.orig/Makefile vlock-1.3/Makefile
--- vlock-1.3.orig/Makefile	1999-01-14 02:19:14.000000000 +0200
+++ vlock-1.3/Makefile	2004-04-23 22:41:14.124808800 +0300
@@ -2,9 +2,8 @@
 
 CC = gcc
 # remove the -DUSE_PAM, -ldl, and -lpam if you aren't using PAM
-RPM_OPT_FLAGS=-O2
-CFLAGS = $(RPM_OPT_FLAGS) -DUSE_PAM
-LDFLAGS = -ldl -lpam -lpam_misc
+CFLAGS += -DSHADOW_PWD
+LDFLAGS = -lcrypt
 
 OBJS = vlock.o signals.o help.o terminal.o input.o