diff --git a/build.sh b/build.sh
index 7766c95..c76d7fc 100755
--- a/build.sh
+++ b/build.sh
@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -eu
-clang generate.c -o generate -std=gnu2x -g
+mkdir -p bin
+clang generate.c -o bin/generate -std=gnu2x -g
 rm -rf public || true
-./generate
+./bin/generate
 cp -r pdf public/pdf