Including PSGallery nuget dependency in Visual studio solution

Problem

How to share postbuild Powershell Script in multiple solution so that each solution can invoke the script in post build event?

Solution Approach

• Created a local PSGallary

• Pushed my script into the gallery

• In the VS, added the new PSGallary as a nuget Source
• Pulled the postbuild script as the nuget package in the solution

Now i am stuck. The script is saved outside the solution in a nuget folder like this.

I don't want to hardcode the path of the script since, the versions changes and so does the path. How can i get the path of the actual nuget package content in post build event without hard coding it? is there other better approaches ?