NPM is confused between the Component generator package called as ngc, So uninstall it, then AOT build will go on smooth

npm uninstall ngc -g

then in your package.json make an entry

 "scripts": {
    "ngc": "node_modules/.bin/ngc -p ./tsconfig-aot.json",
    "start": "npm run ngc && webpack-dev-server --inline --config config/webpack.dev.js --progress --port 3000",
    "webpack": "npm run ngc && webpack --config config/webpack.dev.js",

1. Check your package.json , remove the any 'ngc' module references.
2. Clean your node_modules folder
3. Re-install the required angular-cli modules

Above three steps should solve the issue.