Building on Windows fails

[notmgsk]

Running make gives the following:

make
sbcl --noinform --no-userinit --no-sysinit --disable-debugger \
  --eval "(require 'asdf)" \
  --eval "(push \"$(pwd)/\" asdf:*central-registry*)" \
  --eval "(require 'buildapp)" \
          --eval "(buildapp::build-buildapp)" \
          --eval "#+sbcl (exit) #+ccl (quit)"
Unhandled SB-INT:EXTENSION-FAILURE in thread #<SB-THREAD:THREAD "main thread" RUNNING
                                                {10013D0613}>:
  Don't know how to REQUIRE BUILDAPP.

Explicitly loading the ASDF in Makefile fixes it: --eval "(progn (load \"buildapp.asd\") (asdf:load-system :buildapp))".