I tried to enable FUSE_BUILD_SCRIPT_PHASES in my project (based on https://projects.blender.org/blender/blender), and this improves the build time when I use Xcode, but not on my CI machine, which builds the same project from command line via xcodebuild. And indeed, xcodebuild runs the shell script phases sequentially, even if I set -jobs 20.
What am I doing wrong?