the previous solution couldnt work:
- Packages are toplevel targets, so they need to be in a separate file
- However, Packages should not be used here as it interferes with the
  pattern rules on $(OUTDIR)/bin
- replacing those instead with explicit (non-pattern) rules for this
  exceptional case
- depending from the regular target in $(OUTDIR) on the special one
- depending from the special target on the $(WORKDIR) one