diff --git a/entr.sh b/entr.sh
new file mode 100755
index 0000000..978e798
--- /dev/null
+++ b/entr.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+find . \
+	 -not \( -path './build' -prune \) \
+	 -not \( -path './.git' -prune \) \
+	 -type f \
+	 | entr -cs 'cmake --build build && build/maze-thing'