Tweaked the action

.gitea/workflows/build.yaml

@@ -27,38 +27,13 @@ jobs:
           grep -q "experimental-features" ~/.config/nix/nix.conf 2>/dev/null || \
             echo "experimental-features = nix-command flakes" >> ~/.config/nix/nix.conf
 
-      - name: Configurer CMake (dans le devShell Nix)
+      - name: Build using nix
         run: |
-          nix develop --command bash -c '
-            set -e
-            echo "--- Environnement Nix ---"
-            cmake --version
-            ninja --version
-            echo "--- Configure ---"
-            cmake -S . -B build \
-              -G Ninja \
-              -DCMAKE_BUILD_TYPE=Release \
-              -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
-          '
+            nix build .#engine
 
-      - name: Compiler (dans le devShell Nix)
+      - name: Bundle
         run: |
-          nix develop --command bash -c '
-            set -e
-            cmake --build build --parallel "$(nproc)"
-          '
-
-      - name: Lister les binaires produits
-        if: always()
-        run: |
-          echo "=== Contenu de build/ ==="
-          ls -la build/ || true
-          echo "=== Binaires et leurs dépendances runtime ==="
-          find build -maxdepth 2 -type f -executable \( -name "engine" -o -name "server" \) -exec ls -lh {} \; || true
-          echo "=== Contenu de build/engine ==="
-          ls -la build/engine/ || true
-          echo "=== Contenu de build/server ==="
-          ls -la build/server/ || true
+          nix bundle --bundler github:NixOS/bundlers#toAppImage .#engine --out-link ./engine-bundle
 
       - name: Upload des artefacts
         if: success()
@@ -66,8 +41,7 @@ jobs:
         with:
           name: vulkan-engine
           path: |
-            build/engine/**
-            build/server/**
+            ./engine-bundle
           if-no-files-found: warn
 
       - name: Notify routine