diff --git a/ramcloud-build-scripts/build_jni_so.sh b/ramcloud-build-scripts/build_jni_so.sh
index bd4be1e..0d39716 100755
--- a/ramcloud-build-scripts/build_jni_so.sh
+++ b/ramcloud-build-scripts/build_jni_so.sh
@@ -18,8 +18,8 @@
 set -x
 
 JAVA_HOME=${JAVA_HOME:-/usr/lib/jvm/java-7-oracle}
-ONOS_HOME=${ONOS_HOME:-~/ONOS}
-RAMCLOUD_HOME=${RAMCLOUD_HOME:-~/ramcloud}
+export ONOS_HOME=${ONOS_HOME:-$(cd `dirname $0`; cd ..; pwd)}
+export RAMCLOUD_HOME=${RAMCLOUD_HOME:-~/ramcloud}
 RAMCLOUD_BRANCH=${RAMCLOUD_BRANCH:-master}
 
 mvn -f ${ONOS_HOME}/pom.xml compile -T 1C