diff --git a/README.md b/README.md
index 88a0ffd..44e0da5 100644
--- a/README.md
+++ b/README.md
@@ -1,20 +1,20 @@
 # Nix
 
+- [x] Own nixos ISO
+- [x] Inputs in Nix
+- [x] NixOS builders and writers
+- [x] Nix Shell
+- [x] Nix writers
+- [ ] Ovverrides and overlays
+- [ ] NixOS helper
+- [ ] [Nixhub](https://www.nixhub.io/)
 - [ ] Nix scripts
 - [ ] Nix home-manager, standalone vs sysconfig module
 - [ ] Plasma manager
 - [ ] Stylix
 - [ ] NixOS Everywhere, NixOS Anywhere
-- [x] Inputs in Nix
 - [ ] Nix language (if else statements, pipes, and other interesting things)
 - [ ] Nix Modules
 - [ ] Vlastní options
 - [ ] Nix fetching
 - [ ] Impermanence
-- [x] Own nixos ISO
-- [ ] NixOS helper
-- [x] NixOS builders and writers
-- [ ] Ovverrides and overlays
-- [ ] Nix Shell
-- [x] Nix writers
-- [ ] [Nixhub](https://www.nixhub.io/)
diff --git a/prezentace.md b/prezentace.md
index c849217..a716da3 100644
--- a/prezentace.md
+++ b/prezentace.md
@@ -180,6 +180,12 @@ nix flake show github:kamadorueda/alejandra
 
 ---
 
+# Nová flake
+
+* `nix flake init --template templates#full`
+
+---
+
 # Inputs
 
 * `nix flake metadata --json | jq` - zobrazí vstupy
@@ -228,11 +234,68 @@ nix build /etc/nixos#nixosConfigurations.nixos.config.system.build.toplevel
 # Virtual machine
 
 * `nix run github:nix-community/nixos-generators -- -c ./flake.nix --flake '#default' -f vm --disk-size 20480`
+* `nixos-rebuild build-vm --flake ~/my-system-flake#default`
 * možnost generovat pro různé platformy (Amazon E2C, Docker, ISO, Proxmox, VMware, vagrant, qcow, ...)
 * [https://github.com/nix-community/nixos-generators](https://github.com/nix-community/nixos-generators)
 
 ---
 
+# Nix Shell
+
+- `nix-shell ./`
+
+```nix
+# shell.nix
+{pkgs ? import <nixpkgs> {}}:
+pkgs.mkShell {
+  packages = [
+    (pkgs.python311.withPackages(pypkgs: with pypkgs; [
+      requests
+      numpy
+      pygobject3
+    ]))
+  ]
+}
+```
+
+---
+
+```nix
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }:
+    flake-utils.lib.eachDefaultSystem
+    (
+      system: let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+      in
+        with pkgs; {
+          devShells.default = mkShell {
+            packages = [
+              (pkgs.python311.withPackages (pypkgs:
+                with pypkgs; [
+                  requests
+                  numpy
+                  pygobject3
+                ]))
+            ];
+          };
+        }
+    );
+}
+```
+
+---
+
 # Nix language
 
 * `nix-repl` nebo `nix-instantiate --eval foo.nix`