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Date: Thu, 03 Jun 2004 12:28:12 +0200
From: Oliver Eikemeier <eikemeier@fillmore-labs.com>
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cc: FreeBSD ports <ports@FreeBSD.org>
Subject: Re: Ports with version numbers going backwards: lang/icc
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An alternative approach may be to do

Index: lang/icc/Makefile
===================================================================
RCS file: /home/ncvs/ports/lang/icc/Makefile,v
retrieving revision 1.69
diff -u -r1.69 Makefile
--- lang/icc/Makefile	2 Jun 2004 17:04:54 -0000	1.69
+++ lang/icc/Makefile	3 Jun 2004 10:24:46 -0000
@@ -6,10 +6,10 @@
 #
 
 PORTNAME=	icc
-PORTVERSION=	8.0.066.p067.1
+PORTVERSION=	8.0.066p067.1
 CATEGORIES=	lang linux devel
 MASTER_SITES=
-DISTNAME=	l_cc_pc_${PORTVERSION:C/\.p.+$//}
+DISTNAME=	l_cc_pc_${PORTVERSION:C/p.+$//}
 
 MAINTAINER=	netchild@FreeBSD.org
 COMMENT=	Intels C/C++ compiler, set up to produce native FreeBSD binaries

Which seems to be more fit to what you want to express.