libglade not found – Installation of package ‘RGtk2’ had non-zero exit status

Both R-packages rattle and rggobi depend on RGtk2. Trying to install RGtk2 threw an error: WARNING: libglade not found

sudo aptitude install libglade2-dev
installs the development files for libglade, which allows to load externally stored user interfaces into programs. This development file is needed for the graphical user interfaces of both rggobi and rattle.