Deploy build writes to and modifies the source code. If the forest is read only then the build fails and gives access is denied errors.

Removing ant config file ../make/ant/workspace-generated.properties
INFO: ENABLE_FULL_DEBUG_SYMBOLS=1
INFO: ZIP_DEBUGINFO_FILES=1
Generating ant environment to ../../make/ant/workspace-generated.properties
Could not start process! Failed with error 5: Access is denied.

Could not start process! Failed with error 5: Access is denied.