Merge pull request #1414 from haskell/jneira-update-readme

Add instructions about install cabal with stack and update instructions to run the build script with cabal on windows in the README

Author: jneira

README.md

@@ -212,12 +212,22 @@ The install-script can be invoked via `cabal` instead of `stack` with the comman
 cabal v2-run ./install.hs --project-file install/shake.project <target>
 ```
 
-Running the script with cabal on windows seems to have some issues and is currently not fully supported.
+Running the script with cabal on windows requires a cabal version greater or equal to `3.0.0.0`.
 
 Unfortunately, it is still required to have `stack` installed so that the install-script can locate the `local-bin` directory (on Linux `~/.local/bin`) and copy the `hie` binaries to `hie-x.y.z`, which is required for the `hie-wrapper` to function as expected.
 
 For brevity, only the `stack`-based commands are presented in the following sections.
 
+##### Install cabal using stack
+
+Although you can use hie for stack based projects (those which have a `stack.yaml` in the project base directory) without having cabal installed, you will need it for cabal based projects (with only a `<projectName>.cabal` file or a `cabal.project` one in the project base directory).
+
+You can install an appropiate cabal version using stack by running:
+
+```bash
+stack ./install.hs stack-install-cabal
+```
+
 ##### Install specific GHC Version
 
 Install **Nightly** (and hoogle docs):