DUB, link automatically right object for platform and archi

[Basile B. via Digitalmars-d-learn]

I've converted this section:


"configurations" : [
     {
       "name" : "nux32",
       "dflags" : [
         "objects/coff32/beaengine.o"
       ]
     },
     {
       "name" : "nux64",
       "dflags" : [
         "objects/coff64/beaengine.o"
       ]
     },
     {
       "name" : "win32",
       "dflags" : [
         "objects\\omf32\\beaengine.obj"
       ]


to:


   "buildSettings" : {
     "dflags-linux-x86" : ["objects/coff32/beaengine.o"],
     "dflags-linux-x86_64" : ["objects/coff64/beaengine.o"],
     "dflags-windows-x86" : ["objects\\omf32\\beaengine.obj"]
   },


Because previously the right config could not be selected when 
the package was used as dependency. But now the object is not 
linked in the static library produced by the project.

What's wrong in my description ?