How could I use relative path in the Schema compliance assertion?

I created a lot of Schema compliance assertions and set one wadl file for all of them.
I put it in GIT and my teammate take it.

He has problem because at his PC he has another path to the repository directory.

How could I set unique path to the project directory?

That what I tried without success:

1) Set Project propertie with path
wadlSource = D:\repo\soapui\API.wadl
and then set to the Configure Schedma Compliance Assertation path = ${#Project#wadlSource}

2) Set to the Project parameter Resource Root = ${projectDir}
Set to the Configure Schema Compliance Assertion path = \API.wadl

3) Set to the Configure Schema Compliance Assertion path = ${projectDir}\API.wadl

This variant don't work, could anybody help me?