code: function getMyVersion(buildDir) {
    var builds = getBuildFiles(buildDir);
    var chosen = builds[0];
  
    for (var n=0; n<builds.length; n++) {
      if (semvar.satisfies(getVersion(builds[n]), '<=' + process.versions.node)) chosen = builds[n];
    }
  
    return require(buildDir + '/' + chosen);
  }
docs: Get current node version a retrieve built file for that version.
  
  @param {string} buildDir   Where build files are located.
  @returns {string}          The build file to use.