cannot work with npm install --no-save

[ytianxia6]

I want to put it in pipeline with my c++ project, so I tried to install moxygen with command npm install --no-save moxygen， then I run the command npm run moxygen --anchors --groups --output api-%s.md doc\xml。

I get the errors:

npm error code ENOENT
npm error syscall open
npm error path xxx\package.json
npm error errno -4058
npm error enoent Could not read package.json: Error: ENOENT: no such file or directory, open xxx\package.json'
npm error enoent This is related to npm not being able to find a file.
npm error enoent

Why it always need the file package.json？