Changes

During <tt>./mach build</tt> if you get an error that looks like this: <tt>  /path/to/mozilla-central/obj-x86_64-unknown-linux-gnu/Makefile Error 2</tt>, it  It means you're trying to build for Desktop, the reason might be that the build script can't see your mozconfig file. You can fix this by running <tt>|mach build|</tt> again after exporting a <tt>MOZCONFIG</tt> environment variable.