I've created a pipenv environment and now I'm creating a shell script called bootstrap.sh to activate it and run a flask server, but the following line is producing an error

bootstrap.sh reads as follows

 #!/bin/sh

...

source "$(pipenv --venv)\\Scripts\\activate"

...

Running simply pipenv --venv returns C:\Users\johng\.virtualenvs\cashman-flask-project-2vwc8e6G

But executing the shell script returns a No such file or directory error

$ source bootstrap.sh
/Scripts/activate: No such file or directoryask-project-2vwc8e6G

This is in the vsCode bash terminal on Windows 10. The file certainly exists and can be navigated to, so what is causing this?