1 files changed, 5 insertions, 1 deletions
diff --git a/README.md b/README.md
index 30625b5..39b0fff 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,11 @@ $ docker build -t sshtron .
 $ docker run -t -d -p 2022:2022 --restart always --name sshtron sshtron
 ```
 
-For Raspberry Pi, change the base image in `Dockerfile` from `golang:latest` to `resin/raspberry-pi-golang:latest`.
+For Raspberry Pi, use the following to build the Docker image:
+
+```sh
+$ docker build -t sshtron --build-arg BASE_IMAGE=resin/raspberry-pi-golang:latest .
+```
 
 ## CVE-2016-0777