diff --git a/.gitea/workflows/build-exe.yml b/.gitea/workflows/build-exe.yml
index 44e6c3a..c4de989 100644
--- a/.gitea/workflows/build-exe.yml
+++ b/.gitea/workflows/build-exe.yml
@@ -15,19 +15,45 @@ on:
 
 jobs:
   build:
-    runs-on: windows-latest
+    runs-on: ubuntu-latest
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up Python
-        uses: actions/setup-python@v5
+      - name: Set up Wine
+        uses: egor-tensin/setup-wine@v2
         with:
-          python-version: "3.12"
-          cache: "pip"
+          prefix: /home/runner/wine-prefix
+          version: "9.0"
 
-      - name: Install dependencies
+      - name: Configure Wine prefix (64-bit)
+        run: |
+          export WINEPREFIX=/home/runner/wine-prefix
+          wineboot --init
+          wine reg add \
+            "HKLM\\Software\\Wine\\DllOverrides" \
+            /v "*" /t REG_MULTI_SZ /d "" /f
+
+      - name: Set up Python in Wine
+        run: |
+          export WINEPREFIX=/home/runner/wine-prefix
+          wget -q \
+            https://www.python.org/ftp/python/3.12.4/python-3.12.4-amd64.exe \
+            -O /tmp/python.exe
+          wine /tmp/python.exe \
+            /quiet \
+            InstallAllUsers=1 \
+            PrependPath=1 \
+            Include_test=0
+          rm /tmp/python.exe
+
+      - name: Add Python to PATH
+        run: |
+          echo "/home/runner/wine-prefix/drive_c/Python312" >> $GITHUB_PATH
+          echo "${WINEPREFIX}/drive_c/Python312/Scripts" >> $GITHUB_PATH
+
+      - name: Install Python dependencies
         run: |
           cd server
           python -m pip install --upgrade pip
@@ -39,10 +65,16 @@ jobs:
           pip install pytest pytest-asyncio
           pytest tests/ -v
 
-      - name: Build .exe
+      - name: Build .exe with PyInstaller
         run: |
           cd server
-          python build_exe.py
+          python -m PyInstaller \
+            tray_wrapper.py \
+            --name PaperDash \
+            --onefile \
+            --noconsole \
+            --clean
+          ls -la dist/
 
       - name: Upload artifact
         uses: actions/upload-artifact@v4
@@ -60,5 +92,6 @@ jobs:
           name: "Draft (latest build)"
           body: |
             Latest PaperDash server build from commit ${{ gitea.sha }}.
+            Built on Linux via Wine + PyInstaller.
             Edit tag, name, and notes before publishing.
           artifacts: "server/dist/PaperDash.exe"