diff --git a/README.md b/README.md
index 67bf94c..bc5eb1b 100644
--- a/README.md
+++ b/README.md
@@ -153,3 +153,6 @@ Some references to websites that helped me create this repository:
 * FDE remote SSH unlock: https://nixos.wiki/wiki/Remote_LUKS_Unlocking
 * Impermanence, opt-in to
   persistence: https://github.com/Misterio77/nix-starter-configs/tree/main#try-opt-in-persistance
+* nix-shell / lorri
+  * https://ghedam.at/15978/an-introduction-to-nix-shell
+    * docker-compose.yml for services and nix-shell to run the code