Dub + Optlink == ???

[David Held via Digitalmars-d-learn]

Since DDT (Eclipse plugin) uses Dub, I am trying to convert the DWT 
build instructions into Dub.  Here is my current attempt:

{
     "name" : "foo",
     "description" : "foo",
     "importPaths" : [ "d:/workspace/dwt/imp" ],
     "stringImportPaths" : [ 
"D:/workspace/dwt/org.eclipse.swt.win32.win32.x86/res" ],
     "lflags" : [
        "-L+D:/workspace/dwt/lib",
        "-L/SUBSYSTEM:WINDOWS:4.0"
     ],
     "libs" : [
        "org.eclipse.swt.win32.win32.x86",
        "dwt-base"
     ]
}

Unfortunately, this fails:

...
OPTLINK : Warning 9: Unknown Option : WORKSPACE
OPTLINK : Warning 9: Unknown Option : DWT
OPTLINK : Warning 9: Unknown Option : LIB
org.eclipse.swt.win32.win32.x86.lib
  Warning 2: File Not Found org.eclipse.swt.win32.win32.x86.lib
dwt-base.lib
  Warning 2: File Not Found dwt-base.lib
...

If I could figure out how to properly pass linker arguments in Dub, I 
think I could get this to work.  Clearly, I am doing something wrong, 
but I don't know what.  Any clues?

Dave