diff --git a/README.md b/README.md
index 41cd241..88a0ffd 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 # Nix
 
 - [ ] Nix scripts
-- [ ] Nix home-manager
+- [ ] Nix home-manager, standalone vs sysconfig module
+- [ ] Plasma manager
 - [ ] Stylix
 - [ ] NixOS Everywhere, NixOS Anywhere
 - [x] Inputs in Nix
@@ -12,7 +13,7 @@
 - [ ] Impermanence
 - [x] Own nixos ISO
 - [ ] NixOS helper
-- [ ] NixOS builders and writers
+- [x] NixOS builders and writers
 - [ ] Ovverrides and overlays
 - [ ] Nix Shell
 - [x] Nix writers
diff --git a/prezentace.md b/prezentace.md
index f561af1..418e911 100644
--- a/prezentace.md
+++ b/prezentace.md
@@ -4,6 +4,7 @@ class: invert
 paginate: true
 footer: "Albert Vala, Filip Kohout, Nix flakes & Nix command"
 ---
+
 <style>
     @import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');
     :root {
@@ -69,16 +70,22 @@ nix run nixpkgs#cowsay #New
 * Cokoliv.
 
 ---
+
 # Nix command + flakes
+
 - temp shell
+
 ```shell
 nix shell nixpkgs#alejandra
 nix shell github:kamadorueda/alejandra
 ```
+
 - Show output attr
+
 ```shell
 nix flake show github:kamadorueda/alejandra
-``` 
+```
+
 ---
 
 # Jak použít flakes na systémovou configuraci?
@@ -145,7 +152,9 @@ nix flake show github:kamadorueda/alejandra
   programs.home-manager.enable = true;
 }
 ```
+
 ---
+
 ```nix
 #configuration.nix
 {
@@ -179,11 +188,11 @@ nix flake show github:kamadorueda/alejandra
 * `nix flake update [home-manager]` - aktualizace jednoho vstupu
 
 ```nix
-  inputs = {
-      nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-      nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-24.11";
-      nixpkgs-current = "github:nixos/nixpkgs?ref=3058cf84bce1aba7b1820cb24319a171572217ba-dirty";
-  }
+ inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-24.11";
+    nixpkgs-current = "github:nixos/nixpkgs?ref=3058cf84bce1aba7b1820cb24319a171572217ba-dirty";
+ }
 ```
 
 ---
@@ -212,23 +221,72 @@ nix build /etc/nixos#nixosConfigurations.nixos.config.system.build.toplevel
 * `--build-host` - konfigurace tady
 * `--target-host` - konfigurace tam
 
+* `nix.settings.trusted-users`
+
 ---
 
 # Virtual machine
 
 * `nix run github:nix-community/nixos-generators -- -c ./flake.nix --flake '#default' -f vm --disk-size 20480`
+* 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 language
+
+* `nix-repl` nebo `nix-instantiate --eval foo.nix`
+
+```nix
+# Deklarace setu
+ foo = {
+  bar = "test"
+ }
+
+# "Čtení" setu (evaluation)
+foo.bar
+
+# Let-In syntaxe
+let 
+  foo = {
+    bar = "test"
+  }; 
+in
+foo.bar
+```
+
+---
+
+```nix
+# Rekurze
+ foo = rec {
+  bar = 10;
+  ham  = 5;
+  eggs =  bar + ham;
+ }
+```
+
+```nix
+# Použití with
+ environment.systemPackages = with pkgs; [
+  neovim
+  wireshark
+ ];
+```
+
+---
+
+
 
 ---
 
 # Nix writers
 
 * Jednoduchý způsob přidávání skriptů v různých programovacích jazycích do
-  systému ve flake konfiguraci
+  systému
 * Rozdíl oproti klasickému `pkgs.writeShellScriptBin`
-* [nixpkgs](https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/writers/scripts.nix) -
-  pro všechny možnosti konfigurace skriptů
-* [https://nixos.wiki/wiki/Nix-writers](https://nixos.wiki/wiki/Nix-writers) -
-  osekaná wiki
+* [nixpkgs](https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/writers/scripts.nix) - pro všechny možnosti konfigurace skriptů
+* [https://nixos.wiki/wiki/Nix-writers](https://nixos.wiki/wiki/Nix-writers) - osekaná wiki
 
 ---