diff --git a/CHANGES b/CHANGES
index 0dba865b..07037f00 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,11 @@
+2.8.0-dev.169 | 2024-12-13 12:02:08 -0700
+
+  * CI: Add '=' to ENV commands to silence 'docker build' warnings (Tim Wojtulewicz, Corelight)
+
+  * CI: Add python3-distuils to ubuntu 20 image (Tim Wojtulewicz)
+
+  * CI: Require newer gcc and python on opensuse-leap builds (Tim Wojtulewicz, Corelight)
+
 2.8.0-dev.163 | 2024-12-10 17:27:21 -0700
 
   * Fix ruff F findings (Tim Wojtulewicz, Corelight)
diff --git a/VERSION b/VERSION
index 3ed25606..0f2f1e1a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.8.0-dev.163
+2.8.0-dev.169
diff --git a/ci/alpine/Dockerfile b/ci/alpine/Dockerfile
index bbc9f6ed..ac40431d 100644
--- a/ci/alpine/Dockerfile
+++ b/ci/alpine/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:latest
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20230823
+ENV DOCKERFILE_VERSION=20230823
 
 RUN apk add --no-cache \
   bash \
diff --git a/ci/centos-stream-9/Dockerfile b/ci/centos-stream-9/Dockerfile
index 2243f487..64953c88 100644
--- a/ci/centos-stream-9/Dockerfile
+++ b/ci/centos-stream-9/Dockerfile
@@ -2,7 +2,7 @@ FROM quay.io/centos/centos:stream9
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20220519
+ENV DOCKERFILE_VERSION=20220519
 
 RUN dnf -y install \
     cmake \
diff --git a/ci/debian-11/Dockerfile b/ci/debian-11/Dockerfile
index a94600c5..658fb071 100644
--- a/ci/debian-11/Dockerfile
+++ b/ci/debian-11/Dockerfile
@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20230813
+ENV DOCKERFILE_VERSION=20230813
 
 RUN apt-get update && apt-get -y install \
     cmake \
diff --git a/ci/debian-12/Dockerfile b/ci/debian-12/Dockerfile
index 4dfc0bc6..997aefe2 100644
--- a/ci/debian-12/Dockerfile
+++ b/ci/debian-12/Dockerfile
@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20230612
+ENV DOCKERFILE_VERSION=20230612
 
 RUN apt-get update && apt-get -y install \
     clang \
diff --git a/ci/fedora-35/Dockerfile b/ci/fedora-35/Dockerfile
index 6e39d91c..dd216111 100644
--- a/ci/fedora-35/Dockerfile
+++ b/ci/fedora-35/Dockerfile
@@ -2,7 +2,7 @@ FROM fedora:35
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20220519
+ENV DOCKERFILE_VERSION=20220519
 
 RUN dnf -y install \
     cmake \
diff --git a/ci/fedora-40/Dockerfile b/ci/fedora-40/Dockerfile
index af5bd0fc..7c615c1d 100644
--- a/ci/fedora-40/Dockerfile
+++ b/ci/fedora-40/Dockerfile
@@ -2,7 +2,7 @@ FROM fedora:40
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20241106
+ENV DOCKERFILE_VERSION=20241106
 
 RUN dnf -y install \
     cmake \
diff --git a/ci/fedora-41/Dockerfile b/ci/fedora-41/Dockerfile
index b29a73f4..2adcb4f9 100644
--- a/ci/fedora-41/Dockerfile
+++ b/ci/fedora-41/Dockerfile
@@ -2,7 +2,7 @@ FROM fedora:41
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20241204
+ENV DOCKERFILE_VERSION=20241204
 
 RUN dnf -y install \
     cmake \
diff --git a/ci/opensuse-leap-15.5/Dockerfile b/ci/opensuse-leap-15.5/Dockerfile
index bde5f17e..6445eb9e 100644
--- a/ci/opensuse-leap-15.5/Dockerfile
+++ b/ci/opensuse-leap-15.5/Dockerfile
@@ -2,15 +2,21 @@ FROM opensuse/leap:15.5
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20230612
+ENV DOCKERFILE_VERSION=20230612
 
 RUN zypper in -y \
     cmake \
-    gcc \
-    gcc-c++ \
+    gcc12 \
+    gcc12-c++ \
     git \
     libopenssl-devel \
     make \
-    python3 \
-    python3-devel \
+    python311 \
+    python311-devel \
   && rm -rf /var/cache/zypp
+
+RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.11 100
+RUN update-alternatives --install /usr/bin/python3-config python3-config /usr/bin/python3.11-config 100
+
+RUN update-alternatives --install /usr/bin/cc cc /usr/bin/gcc-12 100
+RUN update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-12 100
diff --git a/ci/opensuse-leap-15.6/Dockerfile b/ci/opensuse-leap-15.6/Dockerfile
index aa652f72..26040a4a 100644
--- a/ci/opensuse-leap-15.6/Dockerfile
+++ b/ci/opensuse-leap-15.6/Dockerfile
@@ -2,15 +2,21 @@ FROM opensuse/leap:15.6
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20240524
+ENV DOCKERFILE_VERSION=20240524
 
 RUN zypper in -y \
     cmake \
-    gcc \
-    gcc-c++ \
+    gcc12 \
+    gcc12-c++ \
     git \
     libopenssl-devel \
     make \
-    python3 \
-    python3-devel \
+    python312 \
+    python312-devel \
   && rm -rf /var/cache/zypp
+
+RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.12 100
+RUN update-alternatives --install /usr/bin/python3-config python3-config /usr/bin/python3.12-config 100
+
+RUN update-alternatives --install /usr/bin/cc cc /usr/bin/gcc-12 100
+RUN update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-12 100
diff --git a/ci/opensuse-tumbleweed/Dockerfile b/ci/opensuse-tumbleweed/Dockerfile
index cbc04e77..02fd2500 100644
--- a/ci/opensuse-tumbleweed/Dockerfile
+++ b/ci/opensuse-tumbleweed/Dockerfile
@@ -2,7 +2,7 @@ FROM opensuse/tumbleweed
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20230329
+ENV DOCKERFILE_VERSION=20230329
 
 RUN zypper in -y \
     cmake \
diff --git a/ci/ubuntu-18.04/Dockerfile b/ci/ubuntu-18.04/Dockerfile
index 670597a1..c98951a3 100644
--- a/ci/ubuntu-18.04/Dockerfile
+++ b/ci/ubuntu-18.04/Dockerfile
@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20220519
+ENV DOCKERFILE_VERSION=20220519
 
 ENV CMAKE_DIR "/opt/cmake"
 ENV CMAKE_VERSION "3.19.1"
diff --git a/ci/ubuntu-20.04/Dockerfile b/ci/ubuntu-20.04/Dockerfile
index 13d73743..70920a73 100644
--- a/ci/ubuntu-20.04/Dockerfile
+++ b/ci/ubuntu-20.04/Dockerfile
@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20220519
+ENV DOCKERFILE_VERSION=20220519
 
 RUN apt-get update && apt-get -y install \
     cmake \
@@ -14,5 +14,6 @@ RUN apt-get update && apt-get -y install \
     make \
     python3.9 \
     python3.9-dev \
+    python3-distutils \
   && apt autoclean \
   && rm -rf /var/lib/apt/lists/*
diff --git a/ci/ubuntu-22.04/Dockerfile b/ci/ubuntu-22.04/Dockerfile
index 38ffc1b3..538608ca 100644
--- a/ci/ubuntu-22.04/Dockerfile
+++ b/ci/ubuntu-22.04/Dockerfile
@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20230813
+ENV DOCKERFILE_VERSION=20230813
 
 RUN apt-get update && apt-get -y install \
     cmake \
diff --git a/ci/ubuntu-24.04/Dockerfile b/ci/ubuntu-24.04/Dockerfile
index 00dc4b33..bad36013 100644
--- a/ci/ubuntu-24.04/Dockerfile
+++ b/ci/ubuntu-24.04/Dockerfile
@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20240510
+ENV DOCKERFILE_VERSION=20240510
 
 RUN apt-get update && apt-get -y install \
     cmake \
diff --git a/ci/ubuntu-24.10/Dockerfile b/ci/ubuntu-24.10/Dockerfile
index 252a1b28..4c111f40 100644
--- a/ci/ubuntu-24.10/Dockerfile
+++ b/ci/ubuntu-24.10/Dockerfile
@@ -4,7 +4,7 @@ ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20241204
+ENV DOCKERFILE_VERSION=20241204
 
 RUN apt-get update && apt-get -y install \
     cmake \
diff --git a/ci/windows/Dockerfile b/ci/windows/Dockerfile
index 6832104f..7d97dc03 100755
--- a/ci/windows/Dockerfile
+++ b/ci/windows/Dockerfile
@@ -18,7 +18,7 @@ FROM mcr.microsoft.com/dotnet/framework/sdk:4.8-windowsservercore-ltsc2019
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20230728
+ENV DOCKERFILE_VERSION=20230728
 
 SHELL [ "powershell" ]