docker-ovs-plugin -- dep / build failure

gistfile1.txt

#### CentOS 7.1 with latest updates, Golang version v1.4.2

root@gce-vsp20150218-centos71--docker-ovs ~]# cat /etc/redhat-release
CentOS Linux release 7.1.1503 (Core)
[root@gce-vsp20150218-centos71--docker-ovs ~]# uname -a
Linux gce-vsp20150218-centos71--docker-ovs 3.10.0-229.7.2.el7.x86_64 #1 SMP Tue Jun 23 22:06:11 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
[root@gce-vsp20150218-centos71--docker-ovs ~]# go version
go version go1.4.2 linux/amd64

#### OVS installed and working
[root@gce-vsp20150218-centos71--docker-ovs ~]# ovs-vsctl -V
ovs-vsctl (Open vSwitch) 3.2.2-74-nuage
Compiled Jul 28 2015 17:53:17
DB Schema 7.6.3

#### Docker experimental up and running with "--default-network=ovs:ovsbr-docker0"

[root@gce-vsp20150218-centos71--docker-ovs ~]# docker version
Client:
 Version:      1.8.0-dev
 API version:  1.21
 Go version:   go1.4.2
 Git commit:   6206cbe
 Built:        Wed Aug  5 17:31:11 UTC 2015
 OS/Arch:      linux/amd64
 Experimental: true

Server:
 Version:      1.8.0-dev
 API version:  1.21
 Go version:   go1.4.2
 Git commit:   6206cbe
 Built:        Wed Aug  5 17:31:11 UTC 2015
 OS/Arch:      linux/amd64
 Experimental: true

[root@gce-vsp20150218-centos71--docker-ovs ~]# ps axuww | grep -i docker
root      8501  0.0  0.3 219152 14884 pts/1    Sl+  10:04   0:01 docker -d --default-network=ovs:ovsbr-docker0
root     18512  0.0  0.0 112640   980 pts/5    R+   11:48   0:00 grep --color=auto -i docker



#### Trying to build "docker-ovs-plugin" under "/usr/src/go"

mkdir -p /usr/src/go/src 
export GOPATH=/usr/src/go
cd /usr/src/go/src
git clone https://github.com/gopher-net/docker-ovs-plugin.git
cd docker-ovs-plugin/plugin/

[root@gce-vsp20150218-centos71--docker-ovs plugin]# go get ./...
# github.com/docker/libnetwork/iptables
../../github.com/docker/libnetwork/iptables/firewalld.go:75: cannot use c.sysconn.Object(dbusInterface, dbus.ObjectPath(dbusPath)) (type dbus.BusObject) as type *dbus.Object in assignment: need type assertion

[root@gce-vsp20150218-centos71--docker-ovs plugin]# go run main.go
# github.com/docker/libnetwork/iptables
../../github.com/docker/libnetwork/iptables/firewalld.go:75: cannot use c.sysconn.Object(dbusInterface, dbus.ObjectPath(dbusPath)) (type dbus.BusObject) as type *dbus.Object in assignment: need type assertion