$ ./gradlew build
Starting a Gradle Daemon, 2 incompatible and 2 stopped Daemons could not be reused, use --status for details
Warning: Mapping new ns http://schemas.android.com/repository/android/common/02 to old ns http://schemas.android.com/repository/android/common/01
Warning: Mapping new ns http://schemas.android.com/repository/android/generic/02 to old ns http://schemas.android.com/repository/android/generic/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/02 to old ns http://schemas.android.com/sdk/android/repo/addon2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/03 to old ns http://schemas.android.com/sdk/android/repo/addon2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/02 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/03 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/03 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/02 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01
Warning: unexpected element (uri:"", local:"base-extension"). Expected elements are <{}codename>,<{}layoutlib>,<{}api-level>
> Task :app:compileDebugKotlin FAILED
w: Runtime JAR files in the classpath should have the same version. These files were found in the classpath:
~/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.50/bf65725d4ae2cf00010d84e945fcbc201f590e11/kotlin-stdlib-jdk8-1.3.50.jar (version 1.3)
~/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.50/50ad05ea1c2595fb31b800e76db464d08d599af3/kotlin-stdlib-jdk7-1.3.50.jar (version 1.3)
~/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.4.10/ea29e063d2bbe695be13e9d044dcfb0c7add398e/kotlin-stdlib-1.4.10.jar (version 1.4)
~/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.4.10/6229be3465805c99db1142ad75e6c6ddeac0b04c/kotlin-stdlib-common-1.4.10.jar (version 1.4)
w: Some runtime JAR files in the classpath have an incompatible version. Consider removing them from the classpath
e: /code/java/treble_app2/app/src/main/java/me/phh/treble/app/Hostapd.kt: (16, 22): Object is not abstract and does not implement abstract base class member public abstract fun debug(p0: NativeHandle!, p1: ArrayList<String!>!): Unit defined in android.hardware.wifi.hostapd.V1_0.IHostapd.Stub
e: /code/java/treble_app2/app/src/main/java/me/phh/treble/app/QtiAudio.kt: (15, 15): Object is not abstract and does not implement abstract base class member public abstract fun debug(p0: NativeHandle!, p1: ArrayList<String!>!): Unit defined in vendor.qti.hardware.radio.am.V1_0.IQcRilAudioCallback.Stub
e: /code/java/treble_app2/app/src/main/java/me/phh/treble/app/QtiAudio.kt: (24, 15): Object is not abstract and does not implement abstract base class member public abstract fun debug(p0: NativeHandle!, p1: ArrayList<String!>!): Unit defined in vendor.qti.qcril.am.V1_0.IQcRilAudioCallback.Stub
Tried it with Java Version 8 and 11.
Tried it with Java Version 8 and 11.
Alternatively: Are there prebuilds available somewhere?