--- a/configure.in	Sun Oct 07 06:10:52 2007 +0000
+++ b/configure.in	Wed Oct 31 09:00:50 2007 +0000
@@ -12,10 +12,12 @@
 
 PKG_CHECK_MODULES(PACKAGE, 
    [ libgnomeui-2.0 dnl
-     esound ])
+     esound dnl
+     libpng ])
 AC_SUBST(PACKAGE_CFLAGS)
 AC_SUBST(PACKAGE_LIBS)
 
+AC_CHECK_LIB(z, ucompress)
 AC_CHECK_LIB(GL, glXQueryVersion)
 
 GETTEXT_PACKAGE=dream