the build or run action should be perfomed on. This ensures that
descriptors have different hashes on different platforms.
svn path=/nix/trunk/test/; revision=18
* Added descriptors for gtkspell and its support package pspell.
Gtkspell is an optional dependency of Pan, so we should add the
ability to nix-instantiate to instantiate variants of a package
based on a selection of features.
svn path=/nix/trunk/test/; revision=16
