I found a bug in the build/make/tools/extract_kernel.py
The error is in try_decompress function, resetting the index while it's not required:
def try_decompress(cmd, search_bytes, input_bytes):
idx = input_bytes.find(search_bytes)
if idx < 0:
return None
idx = 0
...
Now there is not issue tracker for build environment (as far as I understood).
How to proceed ?