ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
ERROR at //BUILD.gn:6:1: Assertion failed.
assert(gn_version >= 2281,
^-----
Your GN is too old! Update it, perhaps by running llvm/utils/gn/get.py
FAILED: build.ninja.stamp 
../../llvm/utils/gn/bin/linux-amd64/gn --root=../.. -q --dotfile=../../llvm/utils/gn/.gn --regeneration gen .
ninja: error: rebuilding 'build.ninja': subcommand failed
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.