The config is within the tarball, the main difference from a devuan/debian/ubuntu kernel is that
debug info and signature have been disabled because it makes an enormous kernel and takes twice
as long to compile
scripts/config --disable DEBUG_INFO
We also override certificate checking
scripts/config --disable SYSTEM_TRUSTED_KEYS
scripts/config --disable SYSTEM_REVOCATION_KEYS
Once the config is copied in the source as .config it was compiled with