I've fixed the gtk2 wrt to being parallel-installable on biarch systems like ppc/ppc64. The changes involved moving the arch-dependent config files to another directory and adding -32/-64 suffixes to the installed binaries. This means in particular that packages which install input modules or pixbuf loaders need changes to their postinstall and postuninstall hooks. To make this easier, the gtk2 package now installs two scripts, update-gdk-pixbuf-loaders and update-gtk-immodules, which expect to be given the host triplet and figure out the binary to call and the config file location based on that. So, if one of your packages installs an input module or pixbuf loader, please update the post hooks accordingly. You can look at librsvg2 or im-sdk for examples. Regards, Matthias