diff --git a/sys/conf/Makefile.kern.inc b/sys/conf/Makefile.kern.inc
index 9d56ee3f62f2..0ee1e76a4b92 100644
--- a/sys/conf/Makefile.kern.inc
+++ b/sys/conf/Makefile.kern.inc
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.kern.inc,v 1.220 2015/09/02 12:38:48 uebayasi Exp $
+#	$NetBSD: Makefile.kern.inc,v 1.221 2015/09/02 13:42:14 uebayasi Exp $
 #
 # This file contains common `MI' targets and definitions and it is included
 # at the bottom of each `MD' ${MACHINE}/conf/Makefile.${MACHINE}.
@@ -160,20 +160,6 @@ LINK_O?=	@${_MKSHMSG} "   link  ${.CURDIR:T}/${.TARGET}" && \
 		${LD} -r ${LINKFORMAT} -Map=${.TARGET}.map -o ${.TARGET} ${.ALLSRC} && \
 		${LD} -r ${LINKFORMAT} -Map=${.TARGET}.map -o ${.TARGET} ${.ALLSRC}
 
-.for _s in ${CFILES}
-.if !commands(${_s:T:R}.o)
-${_s:T:R}.o: ${_s}
-	${NORMAL_C}
-.endif
-.endfor
-
-.for _s in ${SFILES}
-.if !commands(${_s:T:R}.o)
-${_s:T:R}.o: ${_s}
-	${NORMAL_S}
-.endif
-.endfor
-
 ##
 ## (3) libkern and compat
 ##
@@ -317,6 +303,23 @@ SYSTEM_LD_TAIL_STAGE2+=	${SYSTEM_LD_TAIL_EXTRA}
 ## (6) port independent targets and dependencies: assym.h, vers.o
 ##
 
+_CFILES=${CFILES:M/*} ${CFILES:Nswapnetbsd*:N/*:C|^|$S/|}
+_SFILES=${SFILES:M/*} ${SFILES:N/*:C|^|$S/|}
+
+.for _s in ${_CFILES}
+.if !commands(${_s:T:R}.o)
+${_s:T:R}.o: ${_s}
+	${NORMAL_C}
+.endif
+.endfor
+
+.for _s in ${_SFILES}
+.if !commands(${_s:T:R}.o)
+${_s:T:R}.o: ${_s}
+	${NORMAL_S}
+.endif
+.endfor
+
 assym.h: ${GENASSYM_CONF} ${GENASSYM_EXTRAS} $S/conf/genassym.cf
 	${_MKTARGET_CREATE}
 	cat ${GENASSYM_CONF} ${GENASSYM_EXTRAS} $S/conf/genassym.cf | \
@@ -388,8 +391,8 @@ dependall: depend .WAIT all
 .if !target(.depend)
 MKDEP_AFLAGS?=	${AFLAGS}
 MKDEP_CFLAGS?=	${CFLAGS}
-SSRCS=${MD_SFILES} ${SFILES}
-CSRCS=${MD_CFILES} ${MI_CFILES} ${CFILES}
+SSRCS=${MD_SFILES} ${_SFILES}
+CSRCS=${MD_CFILES} ${MI_CFILES} ${_CFILES}
 SRCS=${SSRCS} ${CSRCS}
 DEPS=	${SRCS:T:u:R:S/$/.d/g}
 
diff --git a/sys/conf/files b/sys/conf/files
index 650bfb2c4121..edd6a15c1bd6 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -1,7 +1,7 @@
-#	$NetBSD: files,v 1.1144 2015/08/30 07:52:30 uebayasi Exp $
+#	$NetBSD: files,v 1.1145 2015/09/02 13:42:14 uebayasi Exp $
 #	@(#)files.newconf	7.5 (Berkeley) 5/10/93
 
-version 	20150832
+version 	20150841
 
 #
 # device classes
diff --git a/usr.bin/config/defs.h b/usr.bin/config/defs.h
index 7d1d649939c9..5fbd27b796cf 100644
--- a/usr.bin/config/defs.h
+++ b/usr.bin/config/defs.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: defs.h,v 1.84 2015/09/02 05:09:25 uebayasi Exp $	*/
+/*	$NetBSD: defs.h,v 1.85 2015/09/02 13:42:14 uebayasi Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -107,7 +107,7 @@ extern const char *progname;
  * The next two lines define the current version of the config(1) binary,
  * and the minimum version of the configuration files it supports.
  */
-#define CONFIG_VERSION		20150840
+#define CONFIG_VERSION		20150841
 #define CONFIG_MINVERSION	0
 
 /*
diff --git a/usr.bin/config/mkmakefile.c b/usr.bin/config/mkmakefile.c
index a543777f7bcf..b3bae5aa5864 100644
--- a/usr.bin/config/mkmakefile.c
+++ b/usr.bin/config/mkmakefile.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mkmakefile.c,v 1.57 2015/09/02 13:06:06 uebayasi Exp $	*/
+/*	$NetBSD: mkmakefile.c,v 1.58 2015/09/02 13:42:14 uebayasi Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -45,7 +45,7 @@
 #endif
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: mkmakefile.c,v 1.57 2015/09/02 13:06:06 uebayasi Exp $");
+__RCSID("$NetBSD: mkmakefile.c,v 1.58 2015/09/02 13:42:14 uebayasi Exp $");
 
 #include <sys/param.h>
 #include <ctype.h>
@@ -316,6 +316,21 @@ emitfile(FILE *fp, struct files *fi)
 	fprintf(fp, "%s%s%s%s", prologue, prefix, sep, fi->fi_path);
 }
 
+static void
+emitfilerel(FILE *fp, struct files *fi)
+{
+	const char *prefix, *sep;
+
+	prefix = sep = "";
+	if (*fi->fi_path != '/') {
+		if (fi->fi_prefix != NULL) {
+			prefix = fi->fi_prefix;
+			sep = "/";
+		}
+	}
+	fprintf(fp, "%s%s%s", prefix, sep, fi->fi_path);
+}
+
 static void
 emitobjs(FILE *fp)
 {
@@ -475,7 +490,7 @@ emitfiles(FILE *fp, struct filelist *filelist, int suffix)
 		if ((fi->fi_flags & FI_SEL) == 0)
 			continue;
 		putc('\t', fp);
-		emitfile(fp, fi);
+		emitfilerel(fp, fi);
 		fputs(" \\\n", fp);
 	}