I was too fast:

  $ ident bsd.configure.mk 
  bsd.configure.mk:
     $NetBSD: bsd.configure.mk,v 1.8 2006/07/23 15:33:16 jlam Exp $

  $ make foo
  ...
  ===> Overriding tools for rocksndiamonds-levels-1.0nb2
  ===> Creating toolchain wrappers for rocksndiamonds-levels-1.0nb2
  ===> Extracting for rocksndiamonds-levels-1.0nb2
  ===> Patching for rocksndiamonds-levels-1.0nb2
  => Applying pkgsrc patches...
  => Verifying patch-aa...
  ...
  $

Why does it get to the patch stage if "foo" depends only on "extract"?

  $ ls -1t work.i386/.*done
  work.i386/.build_done
  work.i386/.configure_done
  work.i386/.patch_done
  work.i386/.extract_done
  work.i386/.wrapper_done
  work.i386/.tools_done
  work.i386/.depends_done


ciao
     Klaus