diff --git a/build/debian/build.sh b/build/debian/build.sh
index d75c3f6..7a93349 100755
--- a/build/debian/build.sh
+++ b/build/debian/build.sh
@@ -162,7 +162,7 @@
 }
 
 download_debian_cloud_image() {
-	local ver=master
+	local ver=38da93fe
 	local prj=debian-cloud-images
 	local url="https://salsa.debian.org/cloud-team/${prj}/-/archive/${ver}/${prj}-${ver}.tar.gz"
 	local outdir="${debian_cloud_image}"
diff --git a/build/debian/kokoro/gcp_ubuntu_docker/aarch64/build.sh b/build/debian/kokoro/gcp_ubuntu_docker/aarch64/build.sh
index 3868d63..43f0338 100644
--- a/build/debian/kokoro/gcp_ubuntu_docker/aarch64/build.sh
+++ b/build/debian/kokoro/gcp_ubuntu_docker/aarch64/build.sh
@@ -2,17 +2,6 @@
 
 set -e
 
-# pyenv set up to use python 3.11
-sudo apt update; sudo apt install --no-install-recommends --assume-yes \
-  build-essential libssl-dev zlib1g-dev \
-  libbz2-dev libreadline-dev libsqlite3-dev curl git \
-  libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev
-git clone https://github.com/pyenv/pyenv.git ~/.pyenv
-export PYENV_ROOT="$HOME/.pyenv"
-export PATH="$PYENV_ROOT/bin:$PATH"
-pyenv install 3.11
-pyenv global 3.11
-
 cd "${KOKORO_ARTIFACTS_DIR}/git/avf/build/debian/"
 sudo losetup -D
 grep vmx /proc/cpuinfo || true
diff --git a/build/debian/kokoro/gcp_ubuntu_docker/x86_64/build.sh b/build/debian/kokoro/gcp_ubuntu_docker/x86_64/build.sh
index 1712c24..a935591 100644
--- a/build/debian/kokoro/gcp_ubuntu_docker/x86_64/build.sh
+++ b/build/debian/kokoro/gcp_ubuntu_docker/x86_64/build.sh
@@ -2,17 +2,6 @@
 
 set -e
 
-# pyenv set up to use python 3.11
-sudo apt update; sudo apt install --no-install-recommends --assume-yes \
-  build-essential libssl-dev zlib1g-dev \
-  libbz2-dev libreadline-dev libsqlite3-dev curl git \
-  libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev
-git clone https://github.com/pyenv/pyenv.git ~/.pyenv
-export PYENV_ROOT="$HOME/.pyenv"
-export PATH="$PYENV_ROOT/bin:$PATH"
-pyenv install 3.11
-pyenv global 3.11
-
 cd "${KOKORO_ARTIFACTS_DIR}/git/avf/build/debian/"
 sudo losetup -D
 grep vmx /proc/cpuinfo || true