Sort xml payload in Golang

I have one project in aws lambda in Golang. There we are using aws-api-gateway to accept rest api. I wanted to sort the xml payload based on element coming from the user side. But the problem is unmarshalling the xml payload is not allowed.
I see somewhere that I can use xslt processor to sort the xml. But I’m unable to use this go package(github.com/wamuir/go-xslt) as it requires me to install some extra packages which is not in go. And our platform-team will not allowed it. Is there any other go package that I can use.