Self-service

• I'd be willing to implement a fix

Describe the bug

If your env variable needs to have a value with ${} in it, yarn will error:

Usage Error: Environment variable not found (endpoint)

To reproduce

create a env file with:

CYPRESS_DOWNLOAD_PATH_TEMPLATE="${endpoint}/${platform}-${arch}/cypress.zip"

Environment

windows

Additional context

the problem is here:

I think it just needs a negative look behind for an escaping \ - which would match the behaviour of npm and setting variables in npmrc.