$ make spigot
curl --silent https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar --output BuildTools.jar
touch paper-fake.jar spigot-fake.jar
rm f paper.jar spigot-.jar
java -jar BuildTools.jar --rev latest

WARNING *** Unsupported Java detected (Java 23 [67]*). BuildTools has only been tested up to Java 22. Use of development Java versions is not supported.

WARNING *** You may use java -version to double check your Java version.
[--rev, latest]
Loading BuildTools version: git-BuildTools-5411f5b-186 (#186)
Java Version: Java 23 [67]*
Current Path: /Users/richard/MC
git version 2.24.3 (Apple Git-128)
java version "23" 2024-09-17
Java(TM) SE Runtime Environment (build 23+37-2369)
Java HotSpot(TM) 64-Bit Server VM (build 23+37-2369, mixed mode, sharing)
Attempting to build version: 'latest' use --rev <version> to override
Found version

{ "name": "4341", "description": "Jenkins build 4341", "refs": \{ "BuildData": "533b02cd6ba8dbf8c8607250b02bf2d8c36421e8", "Bukkit": "bc6874dd3d475c87a31ff3bd0cc285a5c73e2677", "CraftBukkit": "f4d957fffd7cd1cc5a7ab632b4b48a16a2e0e248", "Spigot": "a759b629cbf86401aab56b8c3f21a635e9e76c15" }

,
"toolsVersion": 181,
"javaVersions": [65, 66]
}

The version you have requested to build requires Java versions between [Java 21, Java 22], but you are using Java 23 [67]*

Please rerun BuildTools using an appropriate Java version. For obvious reasons outdated MC versions do not support Java versions that did not exist at their release.
make: *** [server.jar] Error 1