Daemon install script: Fixing Error "WorkingDirectory= path is not absolute"

daemon/install/install.sh

@@ -69,7 +69,7 @@ After=network.target
 
 [Service]
 Type=simple
-WorkingDirectory="$INSTALL_DIR"
+WorkingDirectory=$INSTALL_DIR
 ExecStart=node .
 ExecStop=/bin/kill -TERM \$MAINPID