Comment 39 for bug 290136

well because is we can figure out which env variable is not yet set we can add a while loop at the beginning of the launching script in order to wait for this variable to be set.
I tried with

while [ -z "$HOME" ]; do
 echo "waiting"> /dev/null
done

...or...

while [ "$HOME" = "" ]; do
 echo "waiting"> /dev/null
done

But it does not work as $HOME is already set.