diff --git a/Dockerfile.windows b/Dockerfile.windows
index bfdf7ee..e573d5d 100644
--- a/Dockerfile.windows
+++ b/Dockerfile.windows
@@ -2,12 +2,17 @@ ARG img_version
 FROM godot-fedora:${img_version}
 
 RUN dnf -y install --setopt=install_weak_deps=False \
-      mingw32-gcc mingw32-gcc-c++ mingw32-winpthreads-static mingw64-gcc mingw64-gcc-c++ mingw64-winpthreads-static && \
-    export LLVM_MINGW_VERSION=20250528 && \
-    export LLVM_MINGW_NAME=llvm-mingw-${LLVM_MINGW_VERSION}-ucrt-ubuntu-22.04-x86_64 && \
-    curl -LO https://github.com/mstorsjo/llvm-mingw/releases/download/${LLVM_MINGW_VERSION}/${LLVM_MINGW_NAME}.tar.xz && \
-    tar xf ${LLVM_MINGW_NAME}.tar.xz && \
+      mingw32-gcc mingw32-gcc-c++ mingw32-winpthreads-static mingw64-gcc mingw64-gcc-c++ mingw64-winpthreads-static
+
+ENV LLVM_MINGW_VERSION=20250528
+ENV LLVM_MINGW_NAME=llvm-mingw-${LLVM_MINGW_VERSION}-ucrt-ubuntu-22.04-x86_64
+
+# We copy the pre-downloaded file from the runner context into the image
+COPY ${LLVM_MINGW_NAME}.tar.xz .
+
+
+RUN tar xf ${LLVM_MINGW_NAME}.tar.xz && \
     rm -f ${LLVM_MINGW_NAME}.tar.xz && \
-    mv -f ${LLVM_MINGW_NAME} /root/llvm-mingw
+    mv ${LLVM_MINGW_NAME} /root/llvm-mingw
 
 CMD /bin/bash
\ No newline at end of file
diff --git a/build-windows.sh b/build-windows.sh
index 095b6be..dcd29e9 100644
--- a/build-windows.sh
+++ b/build-windows.sh
@@ -26,6 +26,26 @@ buildah pull --tls-verify=false --storage-driver=vfs "$BASE_TAG"
 # This satisfies: FROM godot-fedora:custom
 buildah tag --storage-driver=vfs "$BASE_TAG" "godot-fedora:custom"
 
+# --- Configuration ---
+# Match these exactly to what is in your Dockerfile
+LLVM_VER="20250528"
+LLVM_NAME="llvm-mingw-${LLVM_VER}-ucrt-ubuntu-22.04-x86_64"
+TARBALL="${LLVM_NAME}.tar.xz"
+DOWNLOAD_URL="https://github.com/mstorsjo/llvm-mingw/releases/download/${LLVM_VER}/${TARBALL}"
+
+# ... (Login steps remain the same) ...
+
+echo "---------------------------------------"
+echo "Pre-downloading LLVM Toolchain..."
+echo "---------------------------------------"
+# We check if it exists so we don't re-download if the runner cached it
+if [ ! -f "$TARBALL" ]; then
+    echo "Downloading $TARBALL..."
+    wget "$DOWNLOAD_URL"
+else
+    echo "File already exists. Using cached version."
+fi
+
 echo "---------------------------------------"
 echo "Building Windows Image..."
 echo "---------------------------------------"