diff --git a/README.md b/README.md
index cfb6114..aaf7c9e 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,23 @@ Prophet is on PyPI, so you can use pip to install it:
 $ pip install fbprophet
 ```
 
-The major dependency that Prophet has is `pystan`. PyStan has its own [installation instructions](http://pystan.readthedocs.io/en/latest/installation_beginner.html). Install pystan with pip before using pip to install fbprophet. You may also try the (more experimental) [cmdstanpy backend](https://github.com/stan-dev/cmdstanpy).
+The default dependency that Prophet has is `pystan`. PyStan has its own [installation instructions](http://pystan.readthedocs.io/en/latest/installation_beginner.html). Install pystan with pip before using pip to install fbprophet.
+
+You can also choose a (more experimental) alternative stan backend called `cmdstanpy`. It requires the [CmdStan](https://mc-stan.org/users/interfaces/cmdstan) command line interface and you will have to specify the environment variable `STAN_BACKEND` pointing to it, for example:
+
+```
+# bash
+$ CMDSTAN=/tmp/cmdstan-2.22.1 STAN_BACKEND=CMDSTANPY pip install fbprophet
+```
+
+Note that the `CMDSTAN` variable is directly related to `cmdstanpy` module and can be omitted if your CmdStan binaries are in your `$PATH`.
+
+It is also possible to install Prophet with two backends:
+
+```
+# bash
+$ CMDSTAN=/tmp/cmdstan-2.22.1 STAN_BACKEND=PYSTAN,CMDSTANPY pip install fbprophet
+```
 
 After installation, you can [get started!](https://facebook.github.io/prophet/docs/quick_start.html#python-api)