diff --git a/pkg_summary-utils/DESCR b/pkg_summary-utils/DESCR
index 959a53f243..d6689b4311 100644
--- a/pkg_summary-utils/DESCR
+++ b/pkg_summary-utils/DESCR
@@ -17,3 +17,4 @@ pkg_refresh_summary    - output an information about latest/newest version
 pkg_grep_summary       - grep the summary using AWK expression
 pkg_cleanup_distdir    - remove old unused distfiles
 pkg_uniq_summary       - filter out repeated package summaries
+pkg_summary2build_graph- convert src_summary to build dependency graph
diff --git a/pkg_summary-utils/PLIST b/pkg_summary-utils/PLIST
index d57425dec1..7f570dede4 100644
--- a/pkg_summary-utils/PLIST
+++ b/pkg_summary-utils/PLIST
@@ -1,4 +1,4 @@
-@comment $NetBSD: PLIST,v 1.13 2009/03/31 20:31:46 cheusov Exp $
+@comment $NetBSD: PLIST,v 1.14 2009/05/30 14:18:32 cheusov Exp $
 bin/cvs_checksum
 bin/pkg_assignments2pkgpath
 bin/pkg_cleanup_distdir
@@ -10,6 +10,7 @@ bin/pkg_refresh_summary
 bin/pkg_src_fetch_var
 bin/pkg_src_summary
 bin/pkg_summary2bb_pkgs
+bin/pkg_summary2build_graph
 bin/pkg_summary4view
 bin/pkg_uniq_summary
 bin/pkg_update_src_summary
@@ -22,6 +23,7 @@ man/man1/pkg_list_all_pkgs.1
 man/man1/pkg_micro_src_summary.1
 man/man1/pkg_refresh_summary.1
 man/man1/pkg_src_summary.1
+man/man1/pkg_summary2build_graph.1
 man/man1/pkg_summary4view.1
 man/man1/pkg_uniq_summary.1
 man/man1/pkg_update_src_summary.1
diff --git a/pkg_summary-utils/files/Makefile b/pkg_summary-utils/files/Makefile
index 9cf1701350..21aa9521a1 100644
--- a/pkg_summary-utils/files/Makefile
+++ b/pkg_summary-utils/files/Makefile
@@ -26,7 +26,7 @@ SCRIPTS+=	pkg_update_src_summary pkg_summary4view
 SCRIPTS+=	pkg_update_summary pkg_grep_summary
 SCRIPTS+=	cvs_checksum pkg_assignments2pkgpath
 SCRIPTS+=	pkg_uniq_summary pkg_summary2bb_pkgs
-SCRIPTS+=	pkg_cleanup_distdir
+SCRIPTS+=	pkg_cleanup_distdir pkg_summary2build_graph
 
 MAN=		pkg_summary-utils.7
 MAN+=		pkg_cmp_summary.1 pkg_grep_summary.1
@@ -35,7 +35,7 @@ MAN+=		pkg_src_summary.1 pkg_update_src_summary.1
 MAN+=		pkg_summary4view.1 pkg_update_summary.1
 MAN+=		pkg_refresh_summary.1 pkg_list_all_pkgs.1
 MAN+=		cvs_checksum.1 pkg_uniq_summary.1
-MAN+=		pkg_cleanup_distdir.1
+MAN+=		pkg_cleanup_distdir.1 pkg_summary2build_graph.1
 
 FILES=		README NEWS TODO pkg_grep_summary.awk pkg_src_summary.mk
 
diff --git a/pkg_summary-utils/files/Makefile.version b/pkg_summary-utils/files/Makefile.version
index db7ded9b11..6d68bb4a5e 100644
--- a/pkg_summary-utils/files/Makefile.version
+++ b/pkg_summary-utils/files/Makefile.version
@@ -1 +1 @@
-VERSION=	0.29.0
+VERSION=	0.30.0
diff --git a/pkg_summary-utils/files/NEWS b/pkg_summary-utils/files/NEWS
index 318f627f60..420ab8588c 100644
--- a/pkg_summary-utils/files/NEWS
+++ b/pkg_summary-utils/files/NEWS
@@ -1,3 +1,9 @@
+----------------------------------------------------------------------
+Version 0.30.0, by Aleksey Cheusov, Sat, 30 May 2009 17:12:18 +0300
+
+  - New utility pkg_summary2build_graph that converts src_summary
+    to build dependency graph.
+
 ----------------------------------------------------------------------
 Version 0.29.0, by Aleksey Cheusov, Sun, 10 May 2009 23:00:18 +0300
 
diff --git a/pkg_summary-utils/files/pkg_summary2build_graph.1 b/pkg_summary-utils/files/pkg_summary2build_graph.1
new file mode 100644
index 0000000000..dc9860a234
--- /dev/null
+++ b/pkg_summary-utils/files/pkg_summary2build_graph.1
@@ -0,0 +1,43 @@
+.\"	$NetBSD: pkg_summary2build_graph.1,v 1.1 2009/05/30 14:18:32 cheusov Exp $
+.\"
+.\" Copyright (c) 2008 by Aleksey Cheusov (cheusov@tut.by)
+.\" Absolutely no warranty.
+.\"
+.\" ------------------------------------------------------------------
+.de VB \" Verbatim Begin
+.ft CW
+.nf
+.ne \\$1
+..
+.de VE \" Verbatim End
+.ft R
+.fi
+..
+.\" ------------------------------------------------------------------
+.TH PKG_SUMMARY2BUILD_GRAPH 1 "Jan 29, 2008" "" ""
+.SH NAME
+.B pkg_summary2build_graph
+converts src_summary to build dependency graph
+.SH SYNOPSIS
+.BI pkg_summary2build_graph " [files...]"
+.SH DESCRIPTION
+.B pkg_summary2build_graph
+converts src_summary to build dependency graph analysing
+{alter,native}:../../dep/endencies entries in DEPENDS and
+BUILD_DEPENDS fields.  Format of the output:
+.VB
+   package2 package3
+   package1
+   ...
+.VE
+Here package1 has no dependencies and package3 depends on package2.
+.SH EXAMPLES
+.VB
+pkg_list_all_pkgs | pkg_src_summary | pkg_summary2build_graph
+.VE
+.SH SEE ALSO
+.BR pkg_summary-utils(7) ,
+.BR pkg_summary(5) ,
+.BR pkg_src_summary(1)
+.SH AUTHOR
+Aleksey Cheusov <vle@gmx.net>
diff --git a/pkg_summary-utils/files/pkg_summary2build_graph.in b/pkg_summary-utils/files/pkg_summary2build_graph.in
new file mode 100644
index 0000000000..13668012a5
--- /dev/null
+++ b/pkg_summary-utils/files/pkg_summary2build_graph.in
@@ -0,0 +1,122 @@
+#!/usr/bin/env runawk
+
+# Copyright (c) 2008-2009 Aleksey Cheusov <vle@gmx.net>
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+############################################################
+
+#env "LC_ALL=C"
+
+#use "power_getopt.awk"
+#use "alt_assert.awk"
+#use "braceexpand.awk"
+
+############################################################
+#.begin-str help
+# pkg_summary2build_graph - converts src_summary to build
+#   dependency graph analysing {alter,native}:../../dep/endencies entries
+#   in DEPENDS and BUILD_DEPENDS fields.
+# Format of the output:
+#   package1
+#   package2 package3
+#   ...
+# Here package3 depends on package2, package1 has no dependencies.
+# usage: pkg_summary2build_graph [OPTIONS] [files...]
+# OPTIONS:
+#   -h|--help            display this help
+#.end-str
+############################################################
+
+/^PKGNAME=/ {
+	pkgname = substr($0, 9)
+	pkgbase = pkgname
+	sub(/-[^-]+$/, "", pkgbase)
+
+	pkgpaths [pkgbase] = 1
+
+	next
+}
+
+/^PKGPATH=/ {
+	pkgpath = substr($0, 9)
+	nodep_pkgpaths [pkgpath] = 1
+	next
+}
+
+NF == 0 {
+	assert(pkgbase != "", "Cannot find pkgbase")
+	assert(pkgpath != "", "Cannot find pkgpath")
+
+	pkgpaths [pkgbase] = pkgpath
+
+	pkgbase = pkgpath = ""
+	next
+}
+
+/^DEPENDS=/ || /^BUILD_DEPENDS=/ {
+	sub(/^[^=]+=/, "")
+	delete deps
+	for (i=1; i <= NF; ++i){
+		if ($i !~ /[{]/){
+			sub(/^.*:(..\/..\/)?/, "", $i)
+			deps [$i " " pkgpath] = 1
+			delete nodep_pkgpaths [pkgpath]
+			delete nodep_pkgpaths [$i]
+		}else{
+			depbase = $i
+			sub(/:.*$/, "", depbase)
+			depbase = braceexpand(depbase)
+			sub(/ .*$/, "", depbase)
+			sub(/-\[[^\[\]]*\].$|(>|>=|<|<=|=|-)[^><=-]*$/, "", depbase)
+
+			delete nodep_pkgpaths [pkgpath]
+			hidden_deps [depbase " " pkgpath] = 1
+		}
+	}
+	for (dep in deps){
+		print dep
+	}
+}
+
+END {
+	ex = 0
+
+	for (hdep in hidden_deps){
+		base = hdep
+		sub(/ .*$/, "", base)
+
+		if (! (base in pkgpaths)){
+			print "Cannot find PKGPATH for " base > "/dev/stderr"
+			ex = 1
+		}else{
+			pkgpath = hdep
+			sub(/^.* /, "", pkgpath)
+
+			print pkgpaths [base], pkgpath
+		}
+	}
+
+	for (pkgpath in nodep_pkgpaths){
+		print pkgpath
+	}
+
+	exit ex
+}