angular新建library报错The new command requires to be run outside of a project, but a project definition

使用angular新建项目后，在项目下新建组件库时报错：

The new command requires to be run outside of a project, but a project definition was found at “D:WorkspaceWebstormProjectsnz-supzorroangular.json”.

The new command requires to be run outside of a project, but a project definition was found at "D:WorkspaceWebstormProjectsnz-supzorroangular.json".
 

具体的命令：
ng new nz-supzorro，新建项目名为nz-supzorro的项目；
cd nz-supzorro，切换到项目目录下；
ng new library my-unit，新建组件库，报错！

解决：
首先确定自己已经进入到项目目录下了 √
其次，检查命令，
发现新建组件库的命令应该是ng g library my-unit，命令写错了！