In case you feel like building GIMP 2.8 yourself, here are the packages I
needed on my Dagda system.
atk -- git://git.gnome.org/atk
babl -- git://git.gnome.org/babl
cairo -- git://anongit.freedesktop.org/cairo
gdk-pixbuf -- git://git.gnome.org/gdk-pixbuf
gegl -- git://git.gnome.org/gegl
glib -- git://git.gnome.org/glib
gtk+ -- git clone git://git.gnome.org/gtk+
pango -- git://git.gnome.org/pango
pixman -- git://anongit.freedesktop.org/pixman
gimp -- git://git.gnome.org/gimp
Some of the packages need to be built before others. Unfortunately, I didn't
make note of the order when I was building everything.
First, I installed git:
sudo apt-get install git
Then I followed Martin Nordholts' instructions on how to set up the build
environment and prefix for installation:
http://www.chromecode.com/2009/12/best-way-to-keep-up-with-gimp-from-git_26.html
I chose to install GIMP to /opt rather than my home directory.
Generally, the process went something like this:
export PREFIX=/opt/gimp-git
source $PREFIX/share/config.site
git clone git://git.repository.blah.blah/blah
./autogen.sh --prefix=$PREFIX
make
make install