Update README.md

Author: mshinwell

README.md

@@ -10,7 +10,7 @@ in autumn 2025.
 
 The following gives basic instructions for getting set up.  Please see
 [`HACKING.md`](HACKING.md) for more detailed instructions if you want to develop in this repo.
-That file also contains instructions for installing the Flambda backend compiler in a way
+That file also contains instructions for installing the OxCaml compiler in a way
 that it can be used to build OPAM packages.
 
 ## One-time setup for dev work or installation
@@ -24,27 +24,27 @@ $ eval $(opam env)
 $ opam install dune.3.15.2 menhir.20231231
 ```
 
-You probably then want to fork the `ocaml-flambda/flambda-backend` repo to your own Github org.
+You probably then want to fork the `oxcaml/oxcaml` repo to your own Github org.
 
 ## Branching and configuring
 
 Use normal commands to make a branch from the desired upstream branch (typically `main`), e.g.:
 ```
-$ git clone https://github.com/ocaml-flambda/flambda-backend
-$ cd flambda-backend
+$ git clone https://github.com/oxcaml/oxcaml
+$ cd oxcaml
 $ git checkout -b myfeature origin/main
 ```
 
-The Flambda backend tree has to be configured before building.  The configure script is not checked
+The OxCaml tree has to be configured before building.  The configure script is not checked
 in; you have to run `autoconf`.  For example:
 ```
 $ autoconf
-$ ./configure --prefix=/path/to/install/dir
+$ ./configure --prefix=/path/to/install/dir --enable-runtime5
 ```
 
 ## Building and installing
 
-To build and install the Flambda backend, which produces a compiler installation directory whose
+To build and install OxCaml, which produces a compiler installation directory whose
 layout is compatible with upstream, run:
 ```
 $ make install