I think the exit 0 is exiting the sub-shell and that is why it isn’t working. Would you try making a script which does this instead of running exit 0 directly? For example:
#!/bin/bash
exit 0
This might be saved to a file named exit-zero.sh (with a chmod permission of 700). The build.ignore command would then be the filename “exit-zero.sh” instead.
If this doesn’t work as expected, please let us know.