Conditional Post-Build step in Jenkins (Ideally without plugins)

Question

If I understand correctly I can make a build step conditional using this plugin: https://wiki.jenkins-ci.org/display/JENKINS/Conditional+BuildStep+Plugin

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Answer 1

It is posssible but it is a bit messy and can not be done with ui only.

Create the the conditional build step in the build block and save the konfiguration. Edit the xml file and move the whole conditional build step it to the post build block. Reload the jenkins configuration and it works like intended.