D:\Development\validation\build\tasks\build.js:21
      file.contents = new Buffer(tools.extractImports(file.contents.toString("
                                                          ^
TypeError: Cannot read property 'contents' of undefined
    at DestroyableTransform._transform (D:\Development\validation\build\tasks\build.js:21:59)
    at DestroyableTransform.Transform._read (D:\Development\validation\node_modules\through2\node_modules\readable-stream\lib

\_stream_transform.js:172:10)
    at DestroyableTransform.Transform._write (D:\Development\validation\node_modules\through2\node_modules\readable-stream\lib

\_stream_transform.js:160:12)
    at doWrite (D:\Development\validation\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:326:12)
    at writeOrBuffer (D:\Development\validation\node_modules\through2\node_modules\readable-stream\lib\_stream_writable.js:312:5)
    at DestroyableTransform.Writable.write (D:\Development\validation\node_modules\through2\node_modules\readable-stream\lib

\_stream_writable.js:239:11)
    at DestroyableTransform.ondata (D:\Development\validation\node_modules\aurelia-tools\node_modules\through2\node_modules

\readable-stream\lib\_stream_readable.js:574:20)
    at DestroyableTransform.emit (events.js:107:17)
    at readableAddChunk (D:\Development\validation\node_modules\aurelia-tools\node_modules\through2\node_modules\readable-stream

\lib\_stream_readable.js:198:16)
    at DestroyableTransform.Readable.push (D:\Development\validation\node_modules\aurelia-tools\node_modules

\through2\node_modules\readable-stream\lib\_stream_readable.js:162:10)