URLs to http://nix.cs.uu.nl/dist/tarballs. With content-addressable
mirror support (r9190, NIXPKGS-70) this is no longer necessary:
fetchurl will try to download from that location automatically. So
we can keep the original URLs.
svn path=/nixpkgs/trunk/; revision=9192
*** BIG FAT WARNING ***
Right now these tools can only be used as root, because they are normally
installed SUID root!
svn path=/nixpkgs/trunk/; revision=1234