Build process working directory
A directory from where a build process will be started depends on a value of the <build-type/> attribute "checkout-on-server".
If this attribute is set to false, then temporary directory will be created and build process will be started from that directory. After build is finished this temporary directory will be deleted.
If this attribute is true (default), then build process will be started from <build agent work dir>/Server/<project name>.
Pattern %build.working.dir% could be used within configuration files. It will be replaced with build process working directory. Also Ant build runner sets Ant property called build.working.dir that could be used in a build.xml file.