disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

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# locally computed
md5    f3eeaed018542963b7d2416ef1135ecc    libevent-2.1.8-stable.tar.gz
sha1    2a1b8bb7a262d3fd0ed6a080a20991a6eed675ec    libevent-2.1.8-stable.tar.gz