* A descriptor for running the Pan newsreader.

* 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.

test/build/pspell-build.sh

@@ -0,0 +1,10 @@
+#! /bin/sh
+
+export PATH=/bin:/usr/bin
+
+top=`pwd`
+tar xvfz $src
+cd pspell-*
+./configure --prefix=$top
+make
+make install