diff --git a/spotlight_courses/HS24_NixOS/img/nix-repl.png b/spotlight_courses/HS24_NixOS/img/nix-repl.png
new file mode 100644
index 0000000000000000000000000000000000000000..395b2eaf18be3923cfad1683368c1489d3e86c18
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diff --git a/spotlight_courses/HS24_NixOS/main.pdf b/spotlight_courses/HS24_NixOS/main.pdf
index 2d7c8d494267de269cd929cdad66e0b3cdbec66b..30cb587ba99c6a91080dee33df279d064f75af4f 100644
Binary files a/spotlight_courses/HS24_NixOS/main.pdf and b/spotlight_courses/HS24_NixOS/main.pdf differ
diff --git a/spotlight_courses/HS24_NixOS/main.typ b/spotlight_courses/HS24_NixOS/main.typ
index 1ce34360c35528f9064397a49904e954701d65dd..78245dcc32411c197448c6eeffebc8d24490de09 100644
--- a/spotlight_courses/HS24_NixOS/main.typ
+++ b/spotlight_courses/HS24_NixOS/main.typ
@@ -313,6 +313,7 @@ in
 
 = NixOS
 
+= Flakes
 
 = `nixos-rebuild`
 - uses `Nix` to manage almost *everything* about your system  
@@ -543,6 +544,32 @@ true-color         = true
 ]
 )
 
+
+= Toolbox
+
+== CLI
+=== `nix repl`
+- search for packages
+
+
+=== `nix repl` 
+- inspect configuration
+
+#figure(
+  caption: "extra nix features in my config"
+)[
+  #image("img/nix-repl.png", width: 100%)
+]
+
+
+
+=== nix-shell
+
+== Websites
+
+
+
+
 = packaging
 
 == pitfalls