eoy

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theme: apple-basic highlighter: shiki lineNumbers: true title: EoY 2025 info: |

EoY 2025 #

End of Year presentation of my life in 2025. drawings: persist: false mdc: true transition: slide-left

layout: intro #

EoY 2025 #

End of Year presentation of my life in 2025.

Sebastian Di Luzio, 2025

Did I mention it's about 2025?

transition: slide-up layout: statement #

I played games #

layout: 3-images imageLeft: '/2025/images/games/animal_well.png' imageTopRight: '/2025/images/games/baldurs_gate.png' imageBottomRight: '/2025/images/games/ffxiv.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/games/borderlands_2.png' imageTopRight: '/2025/images/games/ghost.png' imageBottomRight: '/2025/images/games/borderlands_1.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/games/cyberpunk_2.png' imageTopRight: '/2025/images/games/cyberpunk_1.png' imageBottomRight: '/2025/images/games/letthemtrade.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/games/unbeatable.png' imageTopRight: '/2025/images/games/poe.png' imageBottomRight: '/2025/images/games/diablo.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/games/mariokart_1.jpg' imageTopRight: '/2025/images/games/mh_1.png' imageBottomRight: '/2025/images/games/mh_2.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/games/split-fiction.png' imageTopRight: '/2025/images/games/zzz_2.png' imageBottomRight: '/2025/images/games/zzz_1.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/games/satisfactory_1.png' imageTopRight: '/2025/images/games/satisfactory_2.png' imageBottomRight: '/2025/images/games/satisfactory_3.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/games/mtg_5.png' imageTopRight: '/2025/images/games/mtg_2.png' imageBottomRight: '/2025/images/games/mtg_4.png' #

layout: intro-image-right image: '/2025/images/concerts/fox-stevenson.png' transition: slide-up #

I also went to concerts #

layout: 3-images imageLeft: '/2025/images/concerts/witcher.png' imageTopRight: '/2025/images/concerts/top.png' imageBottomRight: '/2025/images/concerts/ashnikko.png' #

layout: intro-image-right image: '/2025/images/scotland/arcade-bar.png' transition: slide-up #

We went to scotland #

layout: 3-images imageLeft: '/2025/images/scotland/liz.JPG' imageTopRight: '/2025/images/scotland/foundation_1.png' imageBottomRight: '/2025/images/scotland/foundation_2.png' #

layout: statement transition: slide-up #

And did some tech stuff #

layout: intro-image-right image: '/2025/images/tech/switchbrew.png' transition: slide-up #

I modded my Switch #

layout: intro-image-right image: '/2025/images/tech/new-router.png' transition: slide-up #

Replaced our router with a new modem + router setup #

It works now.

layout: intro-image-right image: '/2025/images/tech/celeryband.png' transition: slide-up #

Finished first version of celery.band #

A selfhostable salaryband platform with strong anonymization and simple configuration.

At IU, over 30 people signed up and used it to share their salary data anonymously.

layout: intro-image-right image: '/2025/images/tech/singstardb.png' #

Built SingStarDB v0.1 #

An open database of singstar songs and on what discs and platforms they are available.

layout: statement transition: slide-up #

And some general life events #

layout: intro-image-right image: '/2025/images/general/wedding.JPG' transition: slide-up #

Became best man #

layout: intro-image-right image: '/2025/images/general/liqid-app.png' transition: slide-up #

New job! #

Started on 1st of Dec @ LIQID

layout: 3-images imageLeft: '/2025/images/general/csd.jpg' imageTopRight: '/2025/images/general/bogen_schiessen.jpg' imageBottomRight: '/2025/images/general/lotr.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/general/wad_1.jpg' imageTopRight: '/2025/images/general/wad_2.png' imageBottomRight: '/2025/images/general/wad_3.png' transition: slide-up #

layout: 3-images imageLeft: '/2025/images/general/vinyl.png' imageTopRight: '/2025/images/general/teams-call.png' imageBottomRight: '/2025/images/general/espresso.png' #

layout: statement transition: slide-up #

Oh, and I switched from Windows to NixOS on my PC #

layout: intro-image image: '/2025/images/nix/nixos-wallpaper.png' transition: slide-up #

let's talk nix #

layout: intro-image-right image: '/2025/images/nix/nix.png' transition: slide-up #

what is nix even #

here's a helpful chart

layout: center transition: slide-up #

How is software being provided today? #

binaries (.exe, .dmg, .apk, .deb, .rpm, etc.) are built and distributed to end users
every system needs its own build of the software (windows, mac, linux (debian, arch, ...), etc )
dependencies are often shared system-wide: software is often not guaranteed to run unless you install other software first

layout: center transition: slide-up #

What if #

Instead of distributing pre-built binaries, we distributed build instructions that anyone can use to build the software from source code in a reproducible way for their specific machine?

layout: center transition: slide-up #

Let's take discord as an example #

We need to define all of these with the build instructions, and their dependencies too!

layout: center transition: slide-up #

Building everything from source is slow #

What if we had a shared cache of pre-built packages based on these instructions. Instead of building everything from source every time, we could just download the packages from the cache!

layout: center transition: slide-up #

Nix is a Language and a Package Manager that does both of these things #

Aka. Nix DSL (Domain Specific Language) and nixpkgs (The Nix package registry).

It originated in 2003 as a research project by Eelco Dolstra at Utrecht University.

His 2006 doctoral thesis, The Purely Functional Software Deployment Model, describes a declarative and functional approach to software deployment and lays out the design of the Nix package manager.

layout: intro-image-right image: '/2025/images/nix/map_repo_size_fresh.svg' transition: slide-up #

It's also the largest and most up to date collection of packages #

We currently have build instructions for over 120,000 packages, and a public, shared cache for all of them!

layout: center transition: slide-up #

What do we use it for? #

First, install nix on linux, mac, windows, and more (download)

layout: two-cols-header transition: slide-up #

Run packages in ephemeral environments #

::left::

nix-shell -p nodejs_22

::right:: nix nodejs

layout: two-cols-header transition: slide-up #

Open development environments #

::left::


{
  devShells.default = pkgs.mkShell {
    buildInputs = with pkgs; [
      nodejs_22
      pnpm
    ];
    shellHook = ''
      node --version
      pnpm --version
      pnpm i
      pnpm dev
    '';
  };
}

::right::

layout: center transition: slide-up #

Or: Nix + Home Manager #

Use nix to configure your entire user environment declaratively.

layout: center transition: slide-up #

Installing general applications #

```nix
 home-manager.users.${username} =
  {

  }
```
```nix
 home-manager.users.${username} =
  {
    # Define general applications to be installed without further configuration
    packages = with pkgs; [
      bitwarden-desktop
    ];
  }
```
```nix
 home-manager.users.${username} =
  {
    # Define general applications to be installed without further configuration
    packages = with pkgs; [
      bitwarden-desktop
      discord
      signal-desktop
      element-desktop
      tidal-hifi
    ];
  }
```

layout: center transition: slide-up #

Configuring fully supported programs, e.g. firefox #

```nix
 home-manager.users.${username} =
  {
    programs.firefox = {
      # This is all we need to do to install firefox
      enable = true; 
    };
  }
```
```nix
 home-manager.users.${username} =
  {
    programs.firefox = {
      # This is all we need to do to install firefox
      enable = true; 

      # Install extensions
      extensions = with pkgs.nur.repos.rycee.firefox-addons; [
        ublock-origin
      ];
    };
  }
```
```nix
 home-manager.users.${username} =
  {
    programs.firefox = {
      # This is all we need to do to install firefox
      enable = true; 

      # Install extensions
      extensions = with pkgs.nur.repos.rycee.firefox-addons; [
        ublock-origin
      ];

      # Configure search
      search.default = "ddg"; # DuckDuckGo
    };
  }
```
```nix
 home-manager.users.${username} =
  {
    programs.firefox = {
      # This is all we need to do to install firefox
      enable = true; 

      # Install extensions
      extensions = with pkgs.nur.repos.rycee.firefox-addons; [
        ublock-origin
      ];

      # Configure search
      search.default = "ddg"; # DuckDuckGo

      # Deep integration with full set of internal firefox settings
      settings = { 
        "browser.startup.homepage" = "https://diluz.io/sebastian";
        "privacy.trackingprotection.enabled" = true;
      };    
    };
  }
```

layout: statement transition: slide-up #

We can use this configuration on all our machines #

PC, personal laptop, work laptop, servers, etc.

layout: statement transition: slide-up #

What if we built an entire operating system around this concept? #

layout: intro-image-right image: '/2025/images/nix/nixos-logo.svg' transition: slide-up #

NixOS #

A Linux distribution where the entire operating system is built and managed using the Nix package manager.

layout: center transition: slide-up #

What makes NixOS special? #

Reproducibility: The entire system state can be applied to any machine, yielding the same results.
Declarative configuration: The entire system configuration is defined using nix expressions.
Atomic upgrades and rollbacks: System updates are atomic, meaning they either complete successfully or not at all. If an update causes issues, users can easily roll back to a previous system state.

layout: center transition: slide-up #

Set up foundational settings #

```nix
{
  # Time zone
  time.timeZone = "Europe/Berlin";

  # Localization
  i18n.defaultLocale = "en_US.UTF-8";
}
```
```nix
{
  # Time zone
  time.timeZone = "Europe/Berlin";

  # Localization
  i18n.defaultLocale = "en_US.UTF-8";
  i18n.extraLocaleSettings = {
    LC_MEASUREMENT = "de_DE.UTF-8";
    LC_MONETARY = "de_DE.UTF-8";
    LC_NUMERIC = "de_DE.UTF-8";
    LC_PAPER = "de_DE.UTF-8";
    LC_TIME = "de_DE.UTF-8";
  };
}
```

layout: center transition: slide-up #

Set up graphics card #

{
  services.xserver.videoDrivers = [ "nvidia" ];
  hardware.nvidia = {
    modesetting.enable = true;
    powerManagement.enable = false;
    powerManagement.finegrained = false;
    open = false; # Don't use the open source driver
    nvidiaSettings = true;
    package = config.boot.kernelPackages.nvidiaPackages.stable;
  };
}

layout: center transition: slide-up #

{
  services.udev.packages = [ pkgs.yubikey-personalization ];
  services.pcscd.enable = true;
  security.pam = {
    services = {
      login.u2fAuth = true;
      sudo.u2fAuth = true;
      # for login after lockout on KDE
      kde.u2fAuth = true;
    };
    u2f.settings = {
      cue = true; # Tell users to touch the yubikey
    };
  };
}

layout: center #

layout: two-cols-header #

Follow me for more #

::left::

@maybeanerd@bumscode.com #

maybeanerd #

diluz.io/sebastian #

sebastian-di-luzio #

Or come to my booth and ask me anything! #

Booth = the spot where I sit down after this, I guess.

::right::