RDEPEND=">=sci-libs/gsl-1.3 new-interface? ( >=x11-libs/gtk+-2.2 gnome-base/libgnomecanvas =x11-libs/guile-gtk-2* ) !new-interface? ( =dev-libs/glib-1.2* =x11-libs/gtkglarea-1.2* =x11-libs/guile-gtk-1* ) x11-libs/gtkglext virtual/glut virtual/opengl sci-chemistry/ccp4 dev-lang/python # <-- first >=x11-libs/gtk-canvas-0.1.1-r2 dev-lang/python # <-- second dev-scheme/guile-gui dev-scheme/net-http dev-scheme/goosh dev-scheme/guile-www sci-libs/coot-data sci-chemistry/reduce sci-chemistry/probe sci-libs/clipper"
Fixed, thanks for the report.