@@ -37,7 +37,7 @@ type buildOptions struct {

 	context        string

 	dockerfileName string

 	tags           opts.ListOpts

-	labels         []string

+	labels         opts.ListOpts

 	buildArgs      opts.ListOpts

 	ulimits        *runconfigopts.UlimitOpt

 	memory         string

@@ -64,6 +64,7 @@ func NewBuildCommand(dockerCli *client.DockerCli) *cobra.Command {

 		tags:      opts.NewListOpts(validateTag),

 		buildArgs: opts.NewListOpts(runconfigopts.ValidateEnv),

 		ulimits:   runconfigopts.NewUlimitOpt(&ulimits),

+		labels:    opts.NewListOpts(runconfigopts.ValidateEnv),

 	}

 	cmd := &cobra.Command{

@@ -92,7 +93,7 @@ func NewBuildCommand(dockerCli *client.DockerCli) *cobra.Command {

 	flags.StringVar(&options.cpuSetMems, "cpuset-mems", "", "MEMs in which to allow execution (0-3, 0,1)")

 	flags.StringVar(&options.cgroupParent, "cgroup-parent", "", "Optional parent cgroup for the container")

 	flags.StringVar(&options.isolation, "isolation", "", "Container isolation technology")

-	flags.StringSliceVar(&options.labels, "label", []string{}, "Set metadata for an image")

+	flags.Var(&options.labels, "label", "Set metadata for an image")

 	flags.BoolVar(&options.noCache, "no-cache", false, "Do not use cache when building the image")

 	flags.BoolVar(&options.rm, "rm", true, "Remove intermediate containers after a successful build")

 	flags.BoolVar(&options.forceRm, "force-rm", false, "Always remove intermediate containers")

@@ -264,7 +265,7 @@ func runBuild(dockerCli *client.DockerCli, options buildOptions) error {

 		Ulimits:        options.ulimits.GetList(),

 		BuildArgs:      runconfigopts.ConvertKVStringsToMap(options.buildArgs.GetAll()),

 		AuthConfigs:    dockerCli.RetrieveAuthConfigs(),

-		Labels:         runconfigopts.ConvertKVStringsToMap(options.labels),

+		Labels:         runconfigopts.ConvertKVStringsToMap(options.labels.GetAll()),

 	}

 	response, err := dockerCli.Client().ImageBuild(ctx, body, buildOptions)