Now the reason I want to do this is that it looks like my last solution
to build an executable with ECL (I'd like to build a smaller executable
than with SBCL). I was hit by the fact that ASDF did not ship
make-build, which is the build procedure documented by ECL.
Other options like program-op are not really documented either.
I explained and keep track of the issue here:
https://stackoverflow.com/questions/46520876/building-an-executable-with-ecl-missing-dependency-or-can-not-find-make-build-i
:)

Regards,

Vincent