diff --git a/docker/build-tool/debian/Dockerfile b/docker/build-tool/debian/Dockerfile
index 6683cdbabfa7d..24627403d0eee 100644
--- a/docker/build-tool/debian/Dockerfile
+++ b/docker/build-tool/debian/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:bullseye
+FROM python:3.12-bullseye
 
 ENV TERM=dumb
 ENV DEBIAN_FRONTEND=noninteractive
diff --git a/scripts/setup/dev_setup.sh b/scripts/setup/dev_setup.sh
index 2df005e669cda..24a2ace0f21dd 100755
--- a/scripts/setup/dev_setup.sh
+++ b/scripts/setup/dev_setup.sh
@@ -133,6 +133,10 @@ function install_ziglang {
 function install_python3 {
 	PACKAGE_MANAGER=$1
 
+	if python3 --version; then
+		echo "==> python3 is already installed"
+		return
+	fi
 	echo "==> installing python3..."
 
 	case "$PACKAGE_MANAGER" in