Just go away easy debian normal. Don't start around with it. Go to chroot (icon) and enter the following code:
Do a fresh Easy Debain. Don't install no matter which until arduino has been installed.
apt-get install arduino --fix-missing
on one occasion you install it - If you desire to run it without easy debian - you can.
Another choice you do encompass to obtain the downloads from debians main website as well as compile this in your N900 with easy debain (arduino is for every builds [source]).
xterm: debbie arduino