diff --git a/docker/base/install_pythons.sh b/docker/base/install_pythons.sh
index 1500c4a43..2d4ba5dd7 100755
--- a/docker/base/install_pythons.sh
+++ b/docker/base/install_pythons.sh
@@ -2,23 +2,42 @@
 
 set -xeuo pipefail
 
-export PYENV_ROOT=/pyenv
-
-
 # N.B.: The 1st listed version will supply the default `python` on the PATH; otherwise order does
 # not matter.
+# See: https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa
+DEADSNAKES_VERSIONS=(
+  "3.11 {dev,venv,distutils}=3.11.11"
+  "3.7 {dev,venv,distutils}=3.7.17"
+  "3.8 {dev,venv,distutils}=3.8.20"
+  "3.9 {dev,venv,distutils}=3.9.21"
+  "3.10 {dev,venv,distutils}=3.10.16"
+  "3.13 {dev,venv}=3.13.1"
+  "3.14 {dev,venv}=3.14.0~a4"
+)
+
+DEBIAN_FRONTEND=noninteractive apt install --yes software-properties-common
+add-apt-repository --yes --ppa deadsnakes
+for entry in "${DEADSNAKES_VERSIONS[@]}"; do
+  version="${entry/ */}"
+  packages="${entry/* /}*"
+  DEBIAN_FRONTEND=noninteractive apt install --yes $(eval echo python${version}-${packages})
+
+  # Let the 1st version supply the default `python`.
+  if [[ ! -e "/usr/bin/python" ]]; then
+    ln -s "$(which "python${version}")" "/usr/bin/python"
+  fi
+done
+add-apt-repository --yes --remove --ppa deadsnakes
+DEBIAN_FRONTEND=noninteractive apt remove --yes software-properties-common
+DEBIAN_FRONTEND=noninteractive apt autoremove --yes
+
+export PYENV_ROOT="/pyenv"
+
 PYENV_VERSIONS=(
-  3.11.11
   2.7.18
   3.5.10
   3.6.15
-  3.7.17
-  3.8.20
-  3.9.21
-  3.10.16
   3.12.8
-  3.13.1
-  3.14.0a3
   pypy2.7-7.3.17
   pypy3.5-7.0.0
   pypy3.6-7.3.3
@@ -27,7 +46,7 @@ PYENV_VERSIONS=(
   pypy3.9-7.3.16
   pypy3.10-7.3.17
 )
-git clone "${PYENV_REPO:-https://github.com/pyenv/pyenv.git}" "${PYENV_ROOT}" && (
+git clone --depth 1 "${PYENV_REPO:-https://github.com/pyenv/pyenv}" "${PYENV_ROOT}" && (
   cd "${PYENV_ROOT}" && git checkout "${PYENV_SHA:-HEAD}" && src/configure && make -C src
 )
 PATH="${PATH}:${PYENV_ROOT}/bin"
@@ -43,9 +62,5 @@ for version in "${PYENV_VERSIONS[@]}"; do
     exit 1
   fi
 
-  # Let the 1st version supply the default `python`.
-  if [[ ! -e "/usr/bin/python" ]]; then
-    ln -s "${exe_path}" "/usr/bin/python"
-  fi
   ln -s "${exe_path}" "/usr/bin/${exe}"
 done
diff --git a/testing/__init__.py b/testing/__init__.py
index b9be3f12a..fb0538b2b 100644
--- a/testing/__init__.py
+++ b/testing/__init__.py
@@ -492,7 +492,9 @@ def bootstrap_python_installer(dest):
     # type: (str) -> None
     for index in range(3):
         try:
-            subprocess.check_call(args=["git", "clone", "https://github.com/pyenv/pyenv", dest])
+            subprocess.check_call(
+                args=["git", "clone", "--depth", "1", "https://github.com/pyenv/pyenv", dest]
+            )
             return
         except subprocess.CalledProcessError as e:
             print("Error cloning pyenv on attempt", index + 1, "of 3:", e, file=sys.stderr)