diff --git a/mojo-executor.spec b/mojo-executor.spec
index 1472cb0..e8cf17c 100644
--- a/mojo-executor.spec
+++ b/mojo-executor.spec
@@ -57,7 +57,10 @@ perl -pi -e 's#org\.sonatype\.aether\.repository#org.eclipse.aether.repository#g
 	mojo-executor/src/main/java/org/twdata/maven/mojoexecutor/MavenCompatibilityHelper.java
 
 %build
-%mvn_build -f -- -Dmaven.compiler.release=6
+%mvn_build -f \
+%if %{?pkg_vcmp:%pkg_vcmp java-devel >= 9}%{!?pkg_vcmp:0}
+	-- -Dmaven.compiler.release=6
+%endif
 
 %install
 %mvn_install