diff --git a/slides/demo.md b/slides/demo.md
index a4bea13..1ecca0c 100644
--- a/slides/demo.md
+++ b/slides/demo.md
@@ -54,6 +54,10 @@ flowchart TD
         I-->J-->K
 ```
 
+```nix
+beancloud.software.desktop = true;
+```
+
 ---
 
 ## History
@@ -70,7 +74,8 @@ flowchart TD
 
 - [declarative configuration](https://search.nixos.org/options?) (20.000 options) 
 - [package](https://search.nixos.org/packages) count (120.000 + third party)
-- Development community on Github and other hosters
+- versioned config in Git and on the installed NixOS
+- development community on Github and others
 
 ---
 
@@ -90,12 +95,17 @@ flowchart TD
 ```mermaid
 %%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
 flowchart TD
-        B(Disk & OS Installation)
-        C[services.nextcloud.enable=true]
-        D(<b>Nextcloud server)
-        E[services.nextcloud.package=nextcloud30]
-        B--> D
-        D-->C & E
+        A(Disk & OS Installation)
+        B(<b>Nextcloud server)
+        C(MariaDB)
+        D(nginx)
+        E(php-fm)
+        F(Redis)
+        A--> C & D & E & F --> B
+```
+
+```nix
+beancloud.software.nextcloud.server.enable = true;
 ```
 
 ---
@@ -104,15 +114,18 @@ flowchart TD
 
 ```mermaid
 %%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
-flowchart TD
-        B(<b>Disk & OS Installation)
-        E(nspawn container)
-        F(<b>Gitlab server)
-        G[services.gitlab.enable=true]
-        H[services.gitlab.backup.startAt=03:00]
-        I[services.nginx.enable=true]
-        B--> E --> F
-        F-->G & H & I
+flowchart LR
+        A(<b>Disk & OS Installation)
+        B(nspawn container)
+        C(NixOS)
+        D(<b>Gitlab server)
+        E[Postgres]
+        F[nginx]
+        A --> B --> C --> E & F --> D
+```
+
+```nix
+beancloud.software.gitlab = true;
 ```
 
 ---
@@ -122,13 +135,16 @@ flowchart TD
 ```mermaid
 %%{init: {'theme': 'dark', 'themeVariables': { 'darkMode': true }}}%%
 flowchart LR
-        B(<b>Disk & OS Installation)
-        G(Podman container)
-        H(<b>Forgejo)
-        I[virtualisation.containers.enable=true]
-        J[virtualisation.oci-containers.containers.forgejo-frontend.image=codeberg.org/forgejo/forgejo:11.0.3-rootless]
-        K[forgejo-backend.image=docker.io/library/mariadb:11.8.2]
-        B --> I --> G  --> H --> J & K
+        A(<b>Disk & OS Installation)
+        B(Podman container)
+        C(<b>Forgejo)
+        D[virtualisation.oci-containers.containers.forgejo-frontend.image=codeberg.org/forgejo/forgejo:11.0.3-rootless]
+        E[forgejo-backend.image=docker.io/library/mariadb:11.8.2]
+        A --> B --> D & E --> C
+```
+
+```nix
+beancloud.software.forgejo = true;
 ```
 
 ---
@@ -155,6 +171,10 @@ flowchart LR
     B--> I --> J --> L --> K
 ```
 
+```nix
+beancloud.software.splunk = true;
+```
+
 ---
 
 ## Unexpected stuff
diff --git a/slides/flake.nix b/slides/flake.nix
index 562c6c2..de79ed6 100644
--- a/slides/flake.nix
+++ b/slides/flake.nix
@@ -37,6 +37,7 @@
               pip install mkslides --upgrade
               deactivate
               alias mkslides='.venv/bin/mkslides'
+              mkslides serve demo.md
           '';
         };
       }