Attempting to use them results in an error.
Use case: exporting project.buildDirectory as an environment variable so that a target may know the build directory when run using `qbs run`.
- is duplicated by
- 
                    QBS-1087 "product" property not accessible from cpp.setupRunEnvironment Property -           
- Closed
 
-         
- is required for
- 
                    QTCREATORBUG-19274 Qbs: Add library search paths to the run environment -         
- Closed
 
-