epkg

It seems good at first, but it's a classic example of bundling too much 
into one package. Many of its features would better be placed in a build 
system wrapped around encap; e.g. downloading and running autoconf have 
*no* place in a symlink-creator. Transaction logging is also completely 
out of place there.

I have something better (the only feature it's missing is the 
autodownloading and it has *many* features above and beyond encap) and (to 
quote corbet) as soon as I've cleaned it up I'll be releasing it. :)

(However, there'll be a public git repo in a matter of weeks, not years!)