diff --git a/docs/site/index.md b/docs/site/index.md
index ee2e0297a..67ad0f166 100644
--- a/docs/site/index.md
+++ b/docs/site/index.md
@@ -12,6 +12,14 @@ Create your own clan with these initial steps and manage a fleet of machines wit
     curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix | sh -s -- install
     ```
 
+    If you already have installed Nix, make sure you have the `nix-command` and `flakes` configuration enabled in your ~/.config/nix/nix.conf.
+    The determinate installer already comes with this configuration by default.
+
+    ```bash
+    # /etc/nix/nix.conf or ~/.config/nix/nix.conf
+    experimental-features = nix-command flakes
+    ```
+
 === "**NixOS**"
 
     If you run NixOS the `nix` binary is already installed.