diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index c9098f4..e830dc0 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -9,6 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
+        # Nota Bene: Even though the project (currently) targets Java 8 API level,
+        # we cannot build it under Java 8 anymore, because Error Prone (which we use)
+        # must be run on JDK 11 or newer (but we can and are still using
+        # source/target/release 8 instead 11 in the pom.xml).
         java: [ '11', '17', '21' ]
     name: Java ${{ matrix.Java }} CI
     steps:
diff --git a/pom.xml b/pom.xml
index 689881a..537593b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -57,11 +57,13 @@
         <version>3.13.0</version>
         <configuration>
           <!-- Keep the Java version aligned with .github/workflows/maven.yml -->
-          <release>11</release>
+          <source>8</source>
+          <target>8</target>
+          <release>8</release>
           <showWarnings>true</showWarnings>
           <compilerArgs>
             <arg>-Werror</arg>
-            <arg>-Xlint:all</arg>
+            <arg>-Xlint:all,-options</arg>
             <arg>-XDcompilePolicy=simple</arg>
             <arg>-Xplugin:ErrorProne -XepAllDisabledChecksAsWarnings
               -Xep:BooleanParameter:OFF -Xep:AndroidJdkLibsChecker:OFF