Custom make rules yield ambiguous result

[NightStrike]

This is regarding the following file:
http://mingw-w64.svn.sourceforge.net/viewvc/mingw-w64/trunk/mingw-w64-crt/Makefile.am?revision=2163&view=markup

Down at lines 937 to 941, there are two sets of rules, one for 3
specific files and one for the rest of the libs we generate:

lib64/libcrtdll.a lib64/libmsvcrt.a lib64/libmsvcr80.a: lib64/lib%.a:
lib64/%.def
        $(DTDEF) $< --dllname $*.dll -m i386:x86-64 --as-flags=--64

lib64/lib%.a: lib64/%.def
        $(DTDEF) $< -m i386:x86-64 --as-flags=--64


What I noticed is happening is that those three files, libcrtdll.a,
libmsvcrt.a, and libmsvcr80.a, are being built using the second rule
instead of the first, and so they don't contain the rather crucial
--dllname option.

What can I do about this?