diff --git a/run.sh b/run.sh
index 332323b0..0bf5a60a 100755
--- a/run.sh
+++ b/run.sh
@@ -1,4 +1,4 @@
-mkdir build
+mkdir -p build
 cd build
 cmake -DCMAKE_BUILD_TYPE=Release ..
 cmake --build . -j$(nproc)