packr.NewBox finds no boxes when passed a pointer

[peterfraedrich]

Packr is unable to find boxes when using a string pointer as the packr.NewBox() path.

This code fails to create a box when packr is run:

package main

import (
	"flag"
	"fmt"
	"os"

	"github.com/gobuffalo/packr/v2"
)

func main() {
    var configPath = flag.String("path", "./repack", "Relative path to the repack directory")
    flag.Parse()
    if *configPath == "" {
	    fmt.Println("You must provide the absolute path to your repack directory")
	    os.Exit(1)
    }   
    box := packr.NewBox(*configPath)
}

If the path to box : = packr.NewBox() is set to a string then everything works as expected.