OpenWRT Image Builder failing with building OpenWRT image

I am on Ubuntu 16.04 creating OpenWRT image by OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64.tar.bz2 from https://downloads.openwrt.org/snapshots/trunk/ar71xx/generic/. I have all exactly done by https://wiki.openwrt.org/doc/howto/obtain.firmware.generate tutorial but it does not works.

make image PROFILE=TLWR541

starts outputting some commands and outputs of some commands but nothing more. After 10 minutes of nothing I pressed Ctrl + C to stop output. All output was

root@test:~/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64# make image PROFILE=TLWR841
make[1]: Entering directory '/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64'
echo 'Building images for ar71xx - TP-LINK TL-WR841N/ND'
Building images for ar71xx - TP-LINK TL-WR841N/ND
echo 'Packages: base-files busybox dnsmasq dropbear firewall fstools ip6tables iptables keel kmod-ath9k kmod-gpio-button-hotplug libc libgcc logd mtd netifd odhcp6c odhcpd opkg ppp ppp-mod-pppoe swconfig uboot-envtools uci uclient-fetch wpad-mini'
Packages: base-files busybox dnsmasq dropbear firewall fstools ip6tables iptables keel kmod-ath9k kmod-gpio-button-hotplug libc libgcc logd mtd netifd odhcp6c odhcpd opkg ppp ppp-mod-pppoe swconfig uboot-envtools uci uclient-fetch wpad-mini
echo

rm -rf /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/build_dir/target-mips_34kc_musl-1.1.14/root-ar71xx
mkdir -p /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/build_dir/target-mips_34kc_musl-1.1.14/root-ar71xx /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/bin/ar71xx /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/tmp /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/dl
if [ ! -f "/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/packages/Packages" ] || [ ! -f "/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/packages/Packages.gz" ] || [ "`find /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/packages -cnewer /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/packages/Packages.gz`" ]; then 
        echo "Package list missing or not up-to-date, generating it.";
        make package_index; 
else 
        mkdir -p /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/build_dir/target-mips_34kc_musl-1.1.14/root-ar71xx/tmp; 
        IPKG_NO_SCRIPT=1 IPKG_TMP="/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/tmp/ipkgtmp" IPKG_INSTROOT="/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/build_dir/target-mips_34kc_musl-1.1.14/root-ar71xx" IPKG_CONF_DIR="/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/tmp" IPKG_OFFLINE_ROOT="/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/build_dir/target-mips_34kc_musl-1.1.14/root-ar71xx" /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/staging_dir/host/bin/opkg -f /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/repositories.conf --force-depends --force-overwrite --force-postinstall --cache /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/dl --lists-dir ../../../../../../root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/dl --offline-root /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/build_dir/target-mips_34kc_musl-1.1.14/root-ar71xx --add-dest root:/ --add-arch all:100 --add-arch ar71xx:200 update || true; 
fi
Package list missing or not up-to-date, generating it.
make[2]: Entering directory '/root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64'

Building package index...
(cd /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/packages; /root/owrt/OpenWrt-ImageBuilder-ar71xx-generic.Linux-x86_64/scripts/ipkg-make-index.sh . > Packages && 
        gzip -9nc Packages > Packages.gz 
) >/dev/null 2>/dev/null
CMakefile:137: recipe for target 'package_index' failed
make[2]: *** [package_index] Interrupt
Makefile:117: recipe for target '_call_image' failed
make[1]: *** [_call_image] Interrupt
Makefile:195: recipe for target 'image' failed
make: *** [image] Interrupt

similar problem with recipe for target '_call_image' failed was solving user in ticket on OpenWRT site and problem was that user has i686 version of Linux and Image Builder requires x86_64 but I think it is not my case. My uname -a output is

Linux test 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Do you know how to build OpenWRT image?

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