I got stuck on this for half a day… This fixes the failed rebuilds caused by secrets failing to decrypt.
H6E252KXGDCYEWQBUXMKRLVCIAKSDDWTUCNQV3IZNVTFYVQLXBBAC config.age.rekey = {storageMode = "local";masterIdentities = [ ../yubikey.pub ];localStorageDir = ../secrets/rekeyed/${config.networking.hostName};
config.age = {identityPaths = [ "/root/.ssh/id" ];rekey = {storageMode = "local";masterIdentities = [ ../yubikey.pub ];localStorageDir = ../secrets/rekeyed/${config.networking.hostName};};