I can't seem to cp files into containers with mounted docker volumes?

I am using:

Docker for Mac and docker-machine on Mac.
golang 1.6.3
latest pull of engine-api

The following code produces the following error:

// CopyToVolume copies samples into Malice volume
func (client *Docker) CopyToVolume(file persist.File) {
    name := "copy2volume"
    image := "busybox"
    cmd := strslice.StrSlice{"sh", "-c", "while true; do echo 'Hit CTRL+C'; sleep 1; done"}
    binds := []string{"malice:/malice:rw"}
    volSavePath := filepath.Join("/malice/samples", file.SHA256)
    if client.Ping() {
        container, err := client.StartContainer(cmd, name, image, false, binds, nil, nil, nil)
        if err != nil {
            log.Fatal(err)
        }

        // If file doesn't already exists copy into volume
        // stat, err := client.Client.ContainerStatPath(context.Background(), container.ID, volSavePath)
        // if err != nil {
        //  log.Fatal(err)
        // }
        // log.Info(stat)

        dat, err := ioutil.ReadFile(file.Path)
        if err != nil {
            log.Fatal(err)
        }

        copyOptions := types.CopyToContainerOptions{AllowOverwriteDirWithFile: false}
        er.CheckError(client.Client.CopyToContainer(
            context.Background(),
            container.ID,
            volSavePath,
            bytes.NewReader(dat),
            copyOptions,
        ))

        client.RemoveContainer(container, true, true, true)
    }
}

ERRO[0008] "Error response from daemon: lstat /var/lib/docker/aufs/mnt/8baff3cc48493dc83e9bc84e74731ed17ed985d4ece8455698d279c712545b0e/malice/samples/0d1228498210c576a3c0f70816d43c22e4539a170555eaf27f9ed37b6c3ae382: no such file or directory"
goroutine 1 [running]:
github.com/maliceio/malice/malice/errors.CheckErrorWithMessage(0x536c028, 0xc820368770, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/malice/errors/errors.go:24 +0x96
github.com/maliceio/malice/malice/errors.CheckError(0x536c028, 0xc820368770, 0xc820010678)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/malice/errors/errors.go:12 +0x48
github.com/maliceio/malice/malice/maldocker.(*Docker).CopyToVolume(0xc82036b230, 0x7fff5fbff5da, 0x40, 0x7fff5fbff5cd, 0x4d, 0xc820380488, 0x8, 0xc8203d9760, 0x20, 0xc820391b00, ...)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/malice/maldocker/volume.go:76 +0x7ad
github.com/maliceio/malice/commands.cmdScan(0x7fff5fbff5cd, 0x4d, 0x0, 0x0, 0x0)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/commands/scan.go:63 +0x888
github.com/maliceio/malice/commands.glob.func1(0xc820318640, 0x0, 0x0)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/commands/commands.go:25 +0xd3
reflect.Value.call(0x45d4ec0, 0x490c1e8, 0x13, 0x47b6e78, 0x4, 0xc820593460, 0x1, 0x1, 0x0, 0x0, ...)
    /usr/local/opt/go/libexec/src/reflect/value.go:435 +0x120d
reflect.Value.Call(0x45d4ec0, 0x490c1e8, 0x13, 0xc820593460, 0x1, 0x1, 0x0, 0x0, 0x0)
    /usr/local/opt/go/libexec/src/reflect/value.go:303 +0xb1
github.com/maliceio/malice/vendor/github.com/urfave/cli.HandleAction(0x45d4ec0, 0x490c1e8, 0xc820318640, 0x0, 0x0)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/vendor/github.com/urfave/cli/app.go:480 +0x2ee
github.com/maliceio/malice/vendor/github.com/urfave/cli.Command.Run(0x47bed88, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x47ca510, 0xb, 0x0, ...)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/vendor/github.com/urfave/cli/command.go:186 +0x1301
github.com/maliceio/malice/vendor/github.com/urfave/cli.(*App).Run(0xc8202f6a80, 0xc82000a240, 0x3, 0x3, 0x0, 0x0)
    /Users/blacktop/src/go/src/github.com/maliceio/malice/vendor/github.com/urfave/cli/app.go:236 +0xa9c

Any help would be greatly appreciated. I banged my head against it for an hour before posting the issue.

Thank you.

docker / engine-api

I can't seem to cp files into containers with mounted docker volumes? #353