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Is it necessary for a build server to remove node_modules before an AOT build?

~~I am currently dealing with an Angular application that is being deployed using an CI orchestrator and Jenskins.~~
Jenkins job is configured to do the following (relevant steps only):
- fetch sources from Git
- remove node_modules
~~- npm install~~
~~- perform AOT build (--prod + other optimizations)~~
- deploy
~~I have noticed that node_modules removal + npm install + AOT build takes way more time than simply calling npm install + perform AOT build, so I am wondering why the removal.~~
I have asked a few colleagues about this configuration and no one seems to know why the removal is required.
From what I know, removing node_modules is very rarely required (maybe some major update messes up some packages or similar) and I haven't removed any node_modules for any project in years (development environment).
So, is it necessary for a build server to remove node_modules before an AOT build?

I am currently dealing with an Angular application that is being deployed using an CI orchestrator and Jenkins.
Jenkins job is configured to do the following (relevant steps only):
- fetch sources from Git
- remove node_modules
- `npm install`
- perform AOT build (`--prod` + other optimizations)
- deploy
I have noticed that node_modules removal + `npm install` + AOT build takes way more time than simply calling `npm install` + perform AOT build, so I am wondering why the removal.
I have asked a few colleagues about this configuration and no one seems to know why the removal is required.
From what I know, removing node_modules is very rarely required (maybe some major update messes up some packages or similar) and I haven't removed any node_modules for any project in years (development environment).
So, is it necessary for a build server to remove node_modules before an AOT build?

angular build node-modules

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