Here is the error message. I want to build a custom version with added sbs-battery, i2c generic support and some custom apps, so I need to be able to rebuild.

Starting build with ninja
ninja: Entering directory `.'
ninja: error: 'manifest.xml', needed by 'out/target/product/nanopc-t4/system/manifest.xml', missing and no known rule to make it
build/core/ninja.mk:148: recipe for target 'ninja_wrapper' failed
make: *** [ninja_wrapper] Error 1

#### make failed to build some targets (04:04 (mm:ss)) ####

Thanks,
Mike