https://issues.dlang.org/show_bug.cgi?id=17522

          Issue ID: 17522
           Summary: win64.mak broken
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: thecybershadow@gmail.com

"make -f win64.mak" (with DM make) should build a 64-bit dmd.exe.

Presently, it fails with:

Error: don't know how to make '..\generated\64\dmd.exe'

Introduced in https://github.com/dlang/dmd/pull/6873

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