diff --git a/cxx-amd64-alpine-3.20/Dockerfile b/cxx-amd64-alpine-3.20/Dockerfile
new file mode 100644
index 0000000..3cd92d3
--- /dev/null
+++ b/cxx-amd64-alpine-3.20/Dockerfile
@@ -0,0 +1,11 @@
+FROM alpine:3.20
+
+RUN apk add g++ xxd openssl git make
+
+RUN true \
+  && mkdir ~/build2-build \
+  && cd ~/build2-build \
+  && curl -sSfO https://stage.build2.org/0/0.18.0-a.0/build2-install-0.18.0-a.0-stage.sh \
+  && sh build2-install-0.18.0-a.0-stage.sh --yes --trust yes \
+  && cd / \
+  && rm -rf ~/build2-build