Finding the directory a file resides in in Go -- please tell me I'm doin' it wrong.

gistfile1.go

// I feel like this can't possibly be how you're *supposed*
// to find the directory a file resides in in Go.
package clever

import (
    "path"
    "runtime"
)

func GetMyDir() string {
    _, file, _, _ := runtime.Caller(0)
    dir, _ := path.Split(file)
    return dir
}