gnuradio-with-packages was not running makeWrapper on any of the
symlinked executables because `find $out/bin -type f -executable`
does not resolve symlinks. I don't understand how the old code
ever worked on any system.
gnuradio-wrapper is a simple derivation wrapping $(gnuradio)/bin/* to
make other blocks (from `extraPackages') available.
gnuradio-full uses gnuradio-wrapper to build gnuradio with blocks from
gnuradio-osmosdr (therefore allowing the use of rtl-sdr, hackrf, the
ccc-camp2015 badge, and similar).