diff --git a/jjb/onos/onos-maven-verify.sh b/jjb/onos/onos-maven-verify.sh
index ee4ba16..47f4a39 100644
--- a/jjb/onos/onos-maven-verify.sh
+++ b/jjb/onos/onos-maven-verify.sh
@@ -7,4 +7,5 @@
 . tools/build/envDefaults
 echo $PATH
 
-mvn -B clean install -DskipTests -Dcheckstyle.skip
+# try concurrent build, then fallback to sequential on failure
+mvn -B clean install -DskipTests -Dcheckstyle.skip -T 1C || mvn -B clean install -DskipTests -Dcheckstyle.skip
diff --git a/jjb/onos/onos-yang-tools-verify.sh b/jjb/onos/onos-yang-tools-verify.sh
index e406f68..bface83 100755
--- a/jjb/onos/onos-yang-tools-verify.sh
+++ b/jjb/onos/onos-yang-tools-verify.sh
@@ -3,4 +3,5 @@
 # exit on errors
 set -eu -o pipefail
 
-mvn -B clean install
+# try concurrent build, then fallback to sequential on failure
+mvn -B clean install -T 1C || mvn -B clean install