-jar_location="/tmp/wss-unified-agent-$WSS_UNIFIED_AGENT_VERSION.jar"
-wget -nv https://s3.amazonaws.com/unified-agent/wss-unified-agent-$WSS_UNIFIED_AGENT_VERSION.jar \
- -O $jar_location
+jar_location="/tmp/wss-unified-agent-${WSS_UNIFIED_AGENT_VERSION}.jar"
+wss_unified_agent_url="https://s3.amazonaws.com/unified-agent/wss-unified-agent-${WSS_UNIFIED_AGENT_VERSION}.jar"
+wget -nv ${wss_unified_agent_url} -O ${jar_location}