如何在DSL作业参数块中指定buildSelectorParam？

parameters {
    string(name: 'buildSelectorParam', defaultValue: 'master', description: 'Specify the build selector parameter')
}

pipeline {
    agent any
    parameters {
        string(name: 'buildSelectorParam', defaultValue: 'master', description: 'Specify the build selector parameter')
    }
    stages {
        stage('Build') {
            steps {
                script {
                    def buildSelector = [$class: 'BuildSelectorParameter', defaultSelector: 'fallback', description: '', name: 'Build Selector', selector: [$class: 'SpecificBuildSelector', buildNumber: "${params.buildSelectorParam}"]]
                    properties([buildSelector])
                }
            }
        }
    }
}