diff --git a/.gitea/workflows/build-latex.yaml b/.gitea/workflows/build-latex.yaml
new file mode 100644
index 0000000..0f7ddb7
--- /dev/null
+++ b/.gitea/workflows/build-latex.yaml
@@ -0,0 +1,23 @@
+name: "Latex Build"
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+jobs:
+  build-latex:
+    runs-on: debian-latest
+    strategy:
+      matrix:
+        assignment: [
+          "Assignment 4 - Protokollsicherheit (Praxis)"
+        ]
+    steps:
+    - run: apt update && apt install sudo -y
+    - uses: actions/checkout@v3
+    - uses: cachix/install-nix-action@v27
+    - uses: DeterminateSystems/magic-nix-cache-action@main
+    - run: "nix build .#\"${{ matrix.assignment }}\""
+    - uses: actions/upload-artifact@v3
+      with:
+        name: "${{ matrix.assignment }}.pdf"
+        path: result/abgabe.pdf
diff --git a/.gitignore b/.gitignore
index 1122fd4..9dff248 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,12 @@
+# Nix
+result
+
+# Latex
+*.pdf
+*.log
+*.synctex.gz
+
+
 # ---> Python
 # Byte-compiled / optimized / DLL files
 __pycache__/
diff --git a/Assignment 4 - Protokollsicherheit (Praxis)/.gitignore b/Assignment 4 - Protokollsicherheit (Praxis)/.gitignore
deleted file mode 100644
index 76f8498..0000000
--- a/Assignment 4 - Protokollsicherheit (Praxis)/.gitignore	
+++ /dev/null
@@ -1,220 +0,0 @@
-# latex
-*.synctex.gz
-*.log
-
-# ---> Python
-# Byte-compiled / optimized / DLL files
-__pycache__/
-*.py[cod]
-*$py.class
-
-# C extensions
-*.so
-
-# Distribution / packaging
-.Python
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-wheels/
-share/python-wheels/
-*.egg-info/
-.installed.cfg
-*.egg
-MANIFEST
-
-# PyInstaller
-#  Usually these files are written by a python script from a template
-#  before PyInstaller builds the exe, so as to inject date/other infos into it.
-*.manifest
-*.spec
-
-# Installer logs
-pip-log.txt
-pip-delete-this-directory.txt
-
-# Unit test / coverage reports
-htmlcov/
-.tox/
-.nox/
-.coverage
-.coverage.*
-.cache
-nosetests.xml
-coverage.xml
-*.cover
-*.py,cover
-.hypothesis/
-.pytest_cache/
-cover/
-
-# Translations
-*.mo
-*.pot
-
-# Django stuff:
-*.log
-local_settings.py
-db.sqlite3
-db.sqlite3-journal
-
-# Flask stuff:
-instance/
-.webassets-cache
-
-# Scrapy stuff:
-.scrapy
-
-# Sphinx documentation
-docs/_build/
-
-# PyBuilder
-.pybuilder/
-target/
-
-# Jupyter Notebook
-.ipynb_checkpoints
-
-# IPython
-profile_default/
-ipython_config.py
-
-# pyenv
-#   For a library or package, you might want to ignore these files since the code is
-#   intended to run in multiple environments; otherwise, check them in:
-# .python-version
-
-# pipenv
-#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
-#   However, in case of collaboration, if having platform-specific dependencies or dependencies
-#   having no cross-platform support, pipenv may install dependencies that don't work, or not
-#   install all needed dependencies.
-#Pipfile.lock
-
-# poetry
-#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
-#   This is especially recommended for binary packages to ensure reproducibility, and is more
-#   commonly ignored for libraries.
-#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
-#poetry.lock
-
-# pdm
-#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
-#pdm.lock
-#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
-#   in version control.
-#   https://pdm.fming.dev/#use-with-ide
-.pdm.toml
-
-# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
-__pypackages__/
-
-# Celery stuff
-celerybeat-schedule
-celerybeat.pid
-
-# SageMath parsed files
-*.sage.py
-
-# Environments
-.env
-.venv
-env/
-venv/
-ENV/
-env.bak/
-venv.bak/
-
-# Spyder project settings
-.spyderproject
-.spyproject
-
-# Rope project settings
-.ropeproject
-
-# mkdocs documentation
-/site
-
-# mypy
-.mypy_cache/
-.dmypy.json
-dmypy.json
-
-# Pyre type checker
-.pyre/
-
-# pytype static type analyzer
-.pytype/
-
-# Cython debug symbols
-cython_debug/
-
-# PyCharm
-#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
-#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
-#  and can be added to the global gitignore or merged into this file.  For a more nuclear
-#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
-
-# ---> C
-# Prerequisites
-*.d
-
-# Object files
-*.o
-*.ko
-*.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
-*.a
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
-
-# Executables
-*.exe
-*.out
-*.app
-*.i*86
-*.x86_64
-*.hex
-
-# Debug files
-*.dSYM/
-*.su
-*.idb
-*.pdb
-
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
-
diff --git a/Assignment 4 - Protokollsicherheit (Praxis)/abgabe.pdf b/Assignment 4 - Protokollsicherheit (Praxis)/abgabe.pdf
deleted file mode 100644
index d809a48..0000000
Binary files a/Assignment 4 - Protokollsicherheit (Praxis)/abgabe.pdf and /dev/null differ
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..c7dced2
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1716542732,
+        "narHash": "sha256-0Y9fRr0CUqWT4KgBITmaGwlnNIGMYuydu2L8iLTfHU4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d12251ef6e8e6a46e05689eeccd595bdbd3c9e60",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..122c318
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,62 @@
+{
+  description = "LaTeX Documents for Systemsicherheit";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+  };
+  outputs = { self, nixpkgs }: let
+    assignments = [
+      "Assignment 4 - Protokollsicherheit (Praxis)"
+    ];
+
+    forAllSystems = function:
+      nixpkgs.lib.genAttrs [
+        "x86_64-linux"
+        "aarch64-linux"
+      ] (system: function {
+        inherit system;
+        pkgs = nixpkgs.legacyPackages.${system};
+      });
+
+    forAllAssignments = function:
+      nixpkgs.lib.genAttrs assignments (assignment: function assignment);
+
+    texPackages = pkgs: pkgs.texlive.combine {
+        inherit (pkgs.texlive) scheme-full latex-bin latexmk;
+      };
+  in rec {
+    packages = forAllSystems({system, pkgs}: forAllAssignments(assignment: let
+      tex = texPackages pkgs;
+      document = pkgs.stdenvNoCC.mkDerivation rec {
+        name = assignment;
+        src = self;
+        buildInputs = [ pkgs.coreutils tex ];
+        phases = [ "unpackPhase" "buildPhase" "installPhase" ];
+        buildPhase = ''
+          export PATH="${pkgs.lib.makeBinPath buildInputs}";
+          mkdir -p .cache/texmf-var
+          cd "./${assignment}"
+          env TEXMFHOME=.cache TEXMFVAR=.cache/texmf-var \
+            latexmk -interaction=nonstopmode -pdf -lualatex \
+            "./abgabe.tex"
+        '';
+        installPhase = ''
+          mkdir -p $out
+          cp *.pdf $out/
+        '';
+      };
+    in document) // {
+      default = packages.${system}.${pkgs.lib.last assignments};
+    });
+
+    devShells = forAllSystems({pkgs, ...}: let
+      tex = texPackages pkgs;
+    in {
+      default = pkgs.mkShell {
+        packages = [ pkgs.coreutils tex ];
+      };
+    });
+
+    hydraJobs = packages;
+  };
+}
+