Opam environment variable on windows

Is there a way to rename opam environment variables ?

in my opam environment, on my windows box, the “PATH” is named “Path” instead. Indeed, on Windows environment variables are case insensitive.

Although I renamed my variable from “Path” to “PATH”, opam still have “Path” instead of “PATH” (I closed all windows, reboot, etc…).

I thought it was because there is the System Path and the User Path, but renaming both of them doesn’t solve the issue.

Any hint ? Because some of the tools don’t work with “Path” instead of “PATH”