When you install node-sass by npm install,node-sass required lodash.deepclone.
npm will install the lodash.deepclone automatic.
However, node-sass usually install failed blame to network or GFW. And if you install it failed, you may just copy a node-sass to node_modules folder, but have not install lodash.deepclone. and you get a ==ERROR== in console ERROR: Cannot find module lodash.deepclone .
So install lodash.deepclone by yourself.
