How to trigger only when there is a specific word in the PR title?

[soondl]

I want to trigger build only when there is a string "[iOS]" in PR title. For example, [iOS] Fix view logic

I found the parameter "skip build phrase" and I wrote it as follows to match the phrase that does not contain "iOS", but it didn't work.

Is there any other way? Thank you.

[wunaidage]

I don't think REGEX works here. I also want to know how to make this work