diff --git a/README.md b/README.md
index 84cf9e62e..2aaf68023 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,10 @@ Hass.io OS based on buildroot
 
 # building
 Running sudo `./enter.sh` will get you into the build docker container.   
-`make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external`
+`make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external xy_defconfig`
 
 From outside the docker container, while it is still running you can use `./getimage.sh` to get the output image.
+
+# edit
+
+`make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external defconfig BR2_DEFCONFIG=buildroot-external/configs/xy_defconfig`