diff --git a/.github/workflows/docker.sh b/.github/workflows/docker.sh
index 6b7ed6f59..f468fd540 100644
--- a/.github/workflows/docker.sh
+++ b/.github/workflows/docker.sh
@@ -7,22 +7,13 @@ title="yuzu Early Access $ver"
 
 ln -s /home/yuzu/.conan /root
 
-#SDL-2.0.15-14858.tar.gz
-mkdir SDL2 && cd SDL2
-curl -sLO http://libsdl.org/tmp/SDL-2.0.15-14858.tar.gz
-tar -xzf SDL-2.0.15-14858.tar.gz
-cd SDL-2.0.15-14858
-./configure --prefix=/usr
-make && make install
-cd ../../
-
 yuzupatch=( $(ls -d patches/* ) )
 for i in "${yuzupatch[@]}"; do patch -p1 < "$i"; done
 
-find . -name "CMakeLists.txt" -exec sed -i 's/^.*-Werror$/-W/g' {} +
-find . -name "CMakeLists.txt" -exec sed -i 's/^.*-Werror=.*)$/ )/g' {} +
-find . -name "CMakeLists.txt" -exec sed -i 's/^.*-Werror=.*$/ /g' {} +
-find . -name "CMakeLists.txt" -exec sed -i 's/-Werror/-W/g' {} +
+find . -name "CMakeLists.txt" ! -path "*/externals/*" -exec sed -i 's/^.*-Werror$/-W/g' {} +
+find . -name "CMakeLists.txt" ! -path "*/externals/*" -exec sed -i 's/^.*-Werror=.*)$/ )/g' {} +
+find . -name "CMakeLists.txt" ! -path "*/externals/*" -exec sed -i 's/^.*-Werror=.*$/ /g' {} +
+find . -name "CMakeLists.txt" ! -path "*/externals/*" -exec sed -i 's/-Werror/-W/g' {} +
 
 mkdir build && cd build