@Library('github.com/my/libs@master') _

common_jenkinsfile {
  // project parameters
}

def call(body) {
    def config = [:]
    body.resolveStrategy = Closure.DELEGATE_FIRST
    body.delegate = config
    body()

    pipeline {
        agent any
        stages {
            stage('This one should be skipped') {
                when {
                    expression { false }
                }
                steps {
                    echo "this should be skipped, but it does not ("
                }
            }
        }
    }
}