>>> micropython 1.11 Extracting
gzip -d -c /home/buildroot/autobuild/run/instance-0/dl/micropython/micropython-1.11.tar.gz | tar --strip-components=1 -C /home/buildroot/autobuild/run/instance-0/output-1/build/micropython-1.11   -xf -
>>> micropython 1.11 Patching

Applying 0001-fix-version.patch using patch: 
patching file py/makeversionhdr.py
Hunk #1 succeeded at 59 with fuzz 2 (offset -11 lines).
>>> micropython 1.11 Configuring
>>> micropython 1.11 Building
PATH="/home/buildroot/autobuild/run/instance-0/output-1/host/bin:/home/buildroot/autobuild/run/instance-0/output-1/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games" /usr/bin/make -j4 -C /home/buildroot/autobuild/run/instance-0/output-1/build/micropython-1.11/mpy-cross
Use make V=1 or set BUILD_VERBOSE in your environment to increase build verbosity.
make[1]: Entering directory `/home/buildroot/autobuild/run/instance-0/output-1/build/micropython-1.11/mpy-cross'
mkdir -p build/genhdr
mkdir -p build
mkdir -p build/py
make[1]: python3: Command not found
make[1]: *** [build/genhdr/mpversion.h] Error 127
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-0/output-1/build/micropython-1.11/mpy-cross'
make: *** [/home/buildroot/autobuild/run/instance-0/output-1/build/micropython-1.11/.stamp_built] Error 2
make: Leaving directory `/home/buildroot/autobuild/run/instance-0/buildroot'