hi Stefano,
i tried your patch and it seems to be working.
---------------------------------8<-------------------------------
#! /bin/sh
scons \
Prefix=$HOME \
PLTPrefix="/usr" \
PreIncludePath=$HOME/include \
PreLibPath=$HOME/lib \
---------------------------------8<-------------------------------
don't you have an extra \ at the end? try to get rid of that or all
other \'s if that does not work, because it seems that scons believes
there's a '\' target. which might be coming from this script.
best,
gabor