- sed -i -e "s@^DocumentRoot.*@DocumentRoot \"/data$DocumentRoot\"@" $httpd_conf
- ln -nsf $DocumentRoot/PlanetLabConf /data$DocumentRoot/PlanetLabConf
+ if [ -d "/data" ] ; then
+ sed -i -e "s@^DocumentRoot.*@DocumentRoot \"/data$DocumentRoot\"@" $httpd_conf
+ ln -nsf $DocumentRoot/PlanetLabConf /data$DocumentRoot/PlanetLabConf
+ else
+ # NOTE: otherwise, the paths are correct by default.
+ /bin/true
+ fi