a big problem, so I decided to require to user to get the
file and put it in some location in the file system. wget
doesn't seem to accept the file scheme however, so I had to
move the copying into the builder itself. The builder checks
the md5 hash of the downloaded file. Maybe having a separate
'fetchfile' would be useful to make a file in the outside
world pure. I tried to add this to build-support, but this
obviously did not work. I still committed it. Just remove it
if you think that it sucks.
svn path=/nixpkgs/trunk/; revision=716
