diff --git a/rewriter/build.sh b/rewriter/build.sh
index 5a61863..94b8820 100755
--- a/rewriter/build.sh
+++ b/rewriter/build.sh
@@ -31,6 +31,8 @@ fi
 
 time wasm-opt $WASMOPTFLAGS -O4 --vacuum --dce --enable-threads --enable-bulk-memory --enable-simd "$WASM" -o rewriter/out/optimized.wasm
 
+mkdir dist/ || true
+
 {
 
 cat <<EOF