Fix?

.github/workflows/build.yml

@@ -13,8 +13,8 @@ jobs:
       - uses: actions/checkout@v2
       - uses: gradle/wrapper-validation-action@v1
       - run: |
-        wget https://maven.fabricmc.net/net/java/jdk/openjdk-17-ea%2B24_linux-x64_bin.tar.gz -O java.tar.gz
-        tar -xf java.tar.gz -C ./java17
+          wget https://maven.fabricmc.net/net/java/jdk/openjdk-17-ea%2B24_linux-x64_bin.tar.gz -O java.tar.gz
+          tar -xf java.tar.gz -C ./java17
       - run: ./gradlew build javadocJar checkMappings --stacktrace -Porg.gradle.java.installations.paths=./java17
       - name: Build artifacts
         if: ${{ matrix.java == '15-jdk' }}

build.gradle

@@ -834,6 +834,7 @@ javadoc {
 	outputs.upToDateWhen { false }
 
 	if (ENV.CI) {
+		// Java 17 is provided on CI to build the javadocs with, see https://github.com/FabricMC/yarn/issues/2429
 		javaLauncher = javaToolchains.launcherFor {
 			languageVersion = JavaLanguageVersion.of(17)
 		}