Incomplete npm private package installation

I am trying to install a private dependency and I am getting strange behavior. The entry point of this package I want to install is "main": "src/index.js".

1. If I clone the whole repository and use it as a local dependency like this:

   package.json

   "dependencies": {
     ...
     "pkgName": "file:path/to/pkgName"
   }
   

   In the node_modules i get something similar to:

   pkgName
   ├── README.md
   ├── package.json
   └── src
       ├── index.js
       ├── file1.js
       ├── file2.js
       └── file3.js
   

2. But if I install it from my company's bitbucket like this:

   "dependencies": {
     ...
     "pkgName": "git+https://user:password@bitbucket.org/companyName/pkgName.git"
   }
   

   What I get in node_modules is something like:

   pkgName
   ├── README.md
   ├── package.json
   └── src
       ├── index.js
       └── file1.js
   

In both cases the installation is successfully finished but in the last one there are some files missing.

Do you know what could be happening?

I have installed:

• npm 6.14.4
• node 14.16.1