Also remove the trailing filename.
\verbatim
ln -sf /<absolute_path>/gtnets_current/libgtsim-debug.so /<userhome>/usr/lib/libgtnets.so
\verbatim
ln -sf /<absolute_path>/gtnets_current/libgtsim-debug.so /<userhome>/usr/lib/libgtnets.so
-export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/<userhome>/usr/lib/libgtnets.so
+export LD_LIBRARY_PATH=${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}/<userhome>/usr/lib/
mkdir /<userhome>/usr/include/gtnets
cp -fr SRC/*.h /<userhome>/usr/include/gtnets
\endverbatim
mkdir /<userhome>/usr/include/gtnets
cp -fr SRC/*.h /<userhome>/usr/include/gtnets
\endverbatim