diff --git a/build.sh b/build.sh
index bee13f6..099a2f1 100755
--- a/build.sh
+++ b/build.sh
@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
-cd build && cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_C_FLAGS="-g -v -da -Q -O0" .. && make && ./TimeCoil # > ../points.csv && python ../tools/build_3d.py ../points.csv
+mkdir -p build && cd build && cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_C_FLAGS="-g -v -da -Q -O0" .. && make && ./TimeCoil # > ../points.csv && python ../tools/build_3d.py ../points.csv