diff --git a/README.md b/README.md
index d1e9940..9e0359b 100644
--- a/README.md
+++ b/README.md
@@ -27,4 +27,6 @@ Write access is controlled by tokens.
 
 The C++ program is written so that it only uses standard libraries, and is built as a static executable with musl not glibc.
 
+The C++ program is built with cmake.
+
 A Dockerfile is included for conveniently running the C++ program inside docker.