anacron(8) is not a daemon, so there's no reason to have an rc.d script.

Instead use @reboot in root's crontab.

ok giovanni@ (maintainer)

sysutils/anacron/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.15 2013/06/04 13:47:09 giovanni Exp $
+# $OpenBSD: Makefile,v 1.16 2016/01/11 06:59:48 ajacoutot Exp $
 
 COMMENT=	periodic command scheduler
 
@@ -6,6 +6,7 @@ V=		2.5.3
 DISTNAME=	anacron.$V
 PKGNAME=	anacron-$V
 CATEGORIES=	sysutils
+REVISION=	0
 
 MAINTAINER=	Giovanni Bechis <giovanni@openbsd.org>
 

sysutils/anacron/pkg/PLIST

@@ -1,4 +1,4 @@
-@comment $OpenBSD: PLIST,v 1.6 2012/11/20 15:14:41 giovanni Exp $
+@comment $OpenBSD: PLIST,v 1.7 2016/01/11 06:59:48 ajacoutot Exp $
 @extraunexec rm -fr /var/spool/anacron/*
 @man man/man5/anacrontab.5
 @man man/man8/anacron.8
@@ -9,4 +9,3 @@ share/doc/pkg-readmes/${FULLPKGNAME}
 @comment var/spool/
 @comment var/spool/anacron/
 @extra ${SYSCONFDIR}/anacrontab
-@rcscript ${RCDIR}/anacron

sysutils/anacron/pkg/README

@@ -1,4 +1,4 @@
-$OpenBSD: README,v 1.2 2012/11/20 15:25:18 ajacoutot Exp $
+$OpenBSD: README,v 1.3 2016/01/11 06:59:48 ajacoutot Exp $
 
 +-----------------------------------------------------------------------
 | Running ${FULLPKGNAME} on OpenBSD
@@ -26,3 +26,6 @@ Comment out the invocation of these jobs in root's crontab.
 
 If your machine is left running for more than 24h at a time, you
 might also want to invoke anacron from an early morning cron job.
+
+To run anacron(8) at boot time, add the following to root's crontab(5):
+@reboot	${PREFIX}/sbin/anacron -ds

sysutils/anacron/pkg/anacron.rc

@@ -1,12 +0,0 @@
-#!/bin/sh
-#
-# $OpenBSD: anacron.rc,v 1.1 2012/11/20 15:14:41 giovanni Exp $
-
-daemon="${TRUEPREFIX}/sbin/anacron"
-daemon_flags="-s"
-
-. /etc/rc.d/rc.subr
-
-rc_reload=NO
-
-rc_cmd $1