PackageManager overwites changes the SriptableRenderPipeline

Hi,

(Windows Editor)
I'd like to make some changes to the SRP in the Unity packages. But PackageManager overwrite all changes on the next Unity start and try to prevent changes to the SRP packages.

1) Is there any option to prevent overwriting changes are made in a package generally? eg:
ProjectFolder : \SubScene\Library\PackageCache\com.unity.entities@0.1.1-preview\Unity.Scenes.Hybrid ? Changes are made here reflect the result and will recompiled in unity.

2) From where are these files in \Library\PackageCache\ overwritten?

3) If there's no option to prevent overwrite in the package manager, is there any other way to prevent overwriting?

I need a solution! Thank you!

 

My idea was to create an additional preview package based on entities:
com.unity.entities@0.1.1-preview.Q1000

I'v created a sub-folder in Project/packages/ and made a complete copy of the subfolder
com.unity.entities@0.1.1-preview.

and the package.json

Code (CSharp):

1. {
2.   "name": "com.unity.entities",
3.   "displayName": "Entities",
4.   "version": "0.1.1-preview.Q1000",
5.   "unity": "2019.1",
6.   "unityRelease": "0f1",
7.   "dependencies": {
8.     "com.unity.properties": "0.6.2-preview",
9.     "com.unity.mathematics": "1.1.0",
10.     "com.unity.test-framework.performance": "1.0.9-preview",
11.     "com.unity.burst": "1.1.2",
12.     "nuget.mono-cecil": "0.1.6-preview",
13.     "com.unity.jobs": "0.1.1-preview",
14.     "com.unity.collections": "0.1.1-preview"
15.   },
16.   "description": "The Entities package provides a modern Entity Component System (ECS) implementation with a basic set of systems and components made for Unity.",
17.   "keywords": [
18.     "entities",
19.     "dots",
20.     "unity"
21.   ],
22.     "author": {
23.     "name": "Quatum1000 cern",
24.     "email": "Open.Days2019@cern.ch",
25.     "url": "http://www.home.cern"
26.   }
27. }
28.  

but that gets directly into errors.

 

Did not.

I don't understand. The Docs say Creating a new embedded package

1. Create a new subfolder for your package inside the Packages folder.
2. Open your preferred text editor and create a JSON file called package.json.
3. Save it under the new package root folder you created.
4. Fill out all required and mandatory fields in the package manifest (package.json) file.
   

My copy is an additional Entities version now:

 

Isn't a better solution to actually obey read-only status? I notice Unity REMOVES the read-only status and then overwrites it? Messing about editing json files and pretending a package is mine is a ridiculous suggestion to fix this problem.