diff --git a/README.md b/README.md
index 35ed648..d516882 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ The data directories of the services can be found in `/var/lib` on the deployed
 
 Installing profiles
 ---
-The easiest way is to run `nix-shell` in the nix-bitcoin directory and then create a [NixOps](https://nixos.org/nixops/manual/) deployment with the provided network.nix.
+The easiest way is to run `nix-shell` (on a Linux machine) in the nix-bitcoin directory and then create a [NixOps](https://nixos.org/nixops/manual/) deployment with the provided network.nix.
 Fix the FIXMEs in configuration.nix and deploy with nixops in nix-shell.
 See below for a detailed tutorial.