gradle-toolchain.patch

diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index 6c61d50..bf3a582 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -14,8 +14,3 @@ dependencies {
   // see here for more: https://github.com/gradle/gradle/issues/15383
   implementation(files(libs.javaClass.superclass.protectionDomain.codeSource.location))
 }
-
-java {
-  sourceCompatibility = JavaVersion.VERSION_11
-  targetCompatibility = JavaVersion.VERSION_11
-}
diff --git a/buildSrc/src/main/kotlin/pklAllProjects.gradle.kts b/buildSrc/src/main/kotlin/pklAllProjects.gradle.kts
index 4daf287..8c4768f 100644
--- a/buildSrc/src/main/kotlin/pklAllProjects.gradle.kts
+++ b/buildSrc/src/main/kotlin/pklAllProjects.gradle.kts
@@ -22,15 +22,8 @@ configurations {
   }
 }

-plugins.withType(JavaPlugin::class).configureEach {
-  val java = project.extensions.getByType<JavaPluginExtension>()
-  java.sourceCompatibility = JavaVersion.VERSION_11
-  java.targetCompatibility = JavaVersion.VERSION_11
-}
-
 tasks.withType<KotlinCompile>().configureEach {
   kotlinOptions {
-    jvmTarget = "11"
     freeCompilerArgs = freeCompilerArgs + listOf("-Xjsr305=strict", "-Xjvm-default=all")
   }
 }
diff --git a/buildSrc/src/main/kotlin/pklJavaLibrary.gradle.kts b/buildSrc/src/main/kotlin/pklJavaLibrary.gradle.kts
index 720eb74..bf36fb4 100644
--- a/buildSrc/src/main/kotlin/pklJavaLibrary.gradle.kts
+++ b/buildSrc/src/main/kotlin/pklJavaLibrary.gradle.kts
@@ -17,6 +17,11 @@ val libs = the<LibrariesForLibs>()
 java {
   withSourcesJar() // creates `sourcesJar` task
   withJavadocJar()
+
+  toolchain {
+    languageVersion.set(JavaLanguageVersion.of(11))
+    vendor.set(JvmVendorSpec.ADOPTIUM)
+  }
 }

 artifacts {
diff --git a/buildSrc/src/main/kotlin/pklKotlinLibrary.gradle.kts b/buildSrc/src/main/kotlin/pklKotlinLibrary.gradle.kts
index cbc7283..8208350 100644
--- a/buildSrc/src/main/kotlin/pklKotlinLibrary.gradle.kts
+++ b/buildSrc/src/main/kotlin/pklKotlinLibrary.gradle.kts
@@ -24,6 +24,11 @@ tasks.compileKotlin {
   enabled = true // disabled by pklJavaLibrary
 }

+kotlin.jvmToolchain {
+  languageVersion.set(JavaLanguageVersion.of(11))
+  vendor.set(JvmVendorSpec.ADOPTIUM)
+}
+
 spotless {
   kotlin {
     ktfmt(libs.versions.ktfmt.get()).googleStyle()
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 6d1da1d..c8687be 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -26,6 +26,10 @@ pluginManagement {
   }
 }

+plugins {
+    id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
+}
+
 @Suppress("UnstableApiUsage")
 dependencyResolutionManagement {
   repositories {
@@ -33,11 +37,6 @@ dependencyResolutionManagement {
   }
 }

-val javaVersion = JavaVersion.current()
-require(javaVersion.isJava11Compatible) {
-  "Project requires Java 11 or higher, but found ${javaVersion.majorVersion}."
-}
-
 if (gradle.startParameter.taskNames.contains("updateDependencyLocks") ||
   gradle.startParameter.taskNames.contains("uDL")
 ) {