To exclude modules from the build process, modify the userenv.properties file to add entries for the modules to be excluded to the exclude.modules property. This property is a comma-separated list of all modules to be excluded during the build process. The sample-userenv.properties file, which you can use as a template when creating your own userenv.properties file, includes a commented out version of the exclude.modules property:

exclude.modules=DCS-CSR/build.xml,Fluoroscope/build.xml,Mobile/build.xml