Is there a way to install OCaml on a Windows dev drive?
I mean, by default OCaml installs itself on C:\Users, and from what I read, a dev drive needs to be configured as D:, E:, etc. I didn’t see a way to mount a subfolder on another drive.
You can set OPAMROOT as a system or user environment variable in the Control Panel. Then close your Command Prompt / Powershell, and then do opam init.
On my Windows PC I have a Y: dev drive and I point all the package managers to it:
| Key | Value |
|---|---|
| NUGET_PACKAGES | Y:\user\beckf\packages\nuget |
| OPAMROOT | Y:\user\beckf\packages\opam |
| CARGO_HOME | Y:\packages\cargo |
| MAVEN_OPTS | -Dmaven.repo.local=Y:\packages\maven |
| npm_config_cache | Y:\packages\npm |
| PIP_CACHE_DIR | Y:\packages\pip |
| VCPKG_DEFAULT_BINARY_CACHE | Y:\packages\vcpkg |
Most of that is documented at Set up a Dev Drive on Windows 11 | Microsoft Learn (OCaml is not on it, but they accept PRs).
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