diff --git a/scripts.d/50-libjxl/50-libjxl.sh b/scripts.d/50-libjxl/50-libjxl.sh
index 34a8516..87062de 100755
--- a/scripts.d/50-libjxl/50-libjxl.sh
+++ b/scripts.d/50-libjxl/50-libjxl.sh
@@ -21,6 +21,9 @@ ffbuild_dockerbuild() {
         export CXXFLAGS="$CXXFLAGS -DVQSORT_GETRANDOM=0 -DVQSORT_SECURE_SEED=0"
     fi
 
+    export CXXFLAGS="$CXXFLAGS -DHWY_COMPILE_ONLY_SCALAR"
+    export CFLAGS="$CFLAGS -DHWY_COMPILE_ONLY_SCALAR"
+
     cmake -G Ninja -DCMAKE_TOOLCHAIN_FILE="$FFBUILD_CMAKE_TOOLCHAIN" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="$FFBUILD_PREFIX" -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
         -DBUILD_SHARED_LIBS=OFF -DJPEGXL_STATIC=OFF -DJPEGXL_ENABLE_TOOLS=OFF -DJPEGXL_ENABLE_VIEWERS=OFF -DJPEGXL_EMSCRIPTEN=OFF -DJPEGXL_ENABLE_DOXYGEN=OFF \
         -DBUILD_TESTING=OFF -DJPEGXL_ENABLE_EXAMPLES=OFF -DJPEGXL_ENABLE_MANPAGES=OFF -DJPEGXL_ENABLE_JNI=OFF -DJPEGXL_ENABLE_PLUGINS=OFF \