Hi Guix,

this patch is not as bad as it looks, even though most of the lines are
changed.  I noticed that “nsupdate” is not build as part of bind-utils
and replaced the manual and repetitive “build” and “install” phases with
something that can be controlled with the let-bound values “bins” and
“libs” holding the names of executables and libraries, respectively.

What do you think?

(“nsupdate” is checked for by the build system of some SELinux
libraries, which are needed for SSSD.)

~~ Ricardo