diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 441d005..cf8f17d 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -37,18 +37,21 @@ jobs:
       
       - name: Build Windows executable (Self-Built Environment)
         run: |
-          # 1. Create a local Dockerfile
+          # 1. Create a local Dockerfile with ALL necessary tools
           cat <<EOF > Dockerfile.win
           FROM python:3.10-slim
-          RUN apt-get update && apt-get install -y wine binutils-mingw-w64-x86-64 && apt-get clean
+          # objdump is in binutils, wine-tools/binutils-mingw are needed for cross-compiling
+          RUN apt-get update && \
+              apt-get install -y binutils wine binutils-mingw-w64-x86-64 && \
+              apt-get clean
           RUN python -m pip install --upgrade pip pyinstaller requests questionary rich python-dotenv
           WORKDIR /src
           EOF
 
-          # 2. Build local image
+          # 2. Build local image (force fresh build)
           docker build -t local-win-builder -f Dockerfile.win .
 
-          # 3. Use unique container name (Fixed shell variable expansion)
+          # 3. Use unique container name
           CONTAINER_NAME="win-build-${{ github.run_id }}"
           
           docker create --name $CONTAINER_NAME local-win-builder sh -c "pyinstaller --onefile --name tamigo-cli tamigo.py"