我从我的Windows机器上复制了这个应用程序并重新安装了它的依赖项，它似乎在骚扰sass进程，但除此之外我不知道如何取得任何进展。
如果我强制该应用似乎运行正常，只是没有编译CSS。
Running "serve" task
Running "clean:server" (clean) task
>> 1 path cleaned.
Running "wiredep:app" (wiredep) task
Running "wiredep:sass" (wiredep) task
Running "concurrent:server" (concurrent) task
Running "copy:styles" (copy) task
Done, without errors.
Execution Time (2015-02-05 19:33:23 UTC)
loading tasks 2s ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 98%
copy:styles 37ms ▇ 2%
Total 2s
Warning: Running "sass:server" (sass) task
Warning: spawn ENOENT Use --force to continue.
Aborted due to warnings.
Execution Time (2015-02-05 19:33:23 UTC)
loading tasks 2s ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 98%
sass:server 47ms ▇▇ 2%
Total 2s Use --force to continue.
Aborted due to warnings.
Execution Time (2015-02-05 19:33:21 UTC)
loading tasks 1.7s ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 37%
wiredep:app 251ms ▇▇▇ 6%
concurrent:server 2.6s ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 57%
Total 4.5s