diff --git a/.github/workflows/lint-and-build-code.yml b/.github/workflows/lint-and-build-code.yml
index e93089e7..18bdc206 100644
--- a/.github/workflows/lint-and-build-code.yml
+++ b/.github/workflows/lint-and-build-code.yml
@@ -29,8 +29,21 @@ jobs:
     name: Lint codebase
     runs-on: ubuntu-latest
     timeout-minutes: 10
+    # Don't flag the whole workflow as failed if "experimental" matrix jobs
+    # fail. This allows the unstable image linting tasks to fail without
+    # marking the oldstable and stable image linting jobs as failed.
+    continue-on-error: ${{ matrix.experimental }}
+    strategy:
+      # Don't stop all workflow jobs if the unstable image linting tasks fail.
+      fail-fast: false
+      matrix:
+        container-image: ["go-ci-oldstable", "go-ci-stable"]
+        experimental: [false]
+        include:
+          - container-image: "go-ci-unstable"
+            experimental: true
     container:
-      image: index.docker.io/atc0005/go-ci:go-ci-lint-only
+      image: "ghcr.io/atc0005/go-ci:${{ matrix.container-image}}"
 
     steps:
       - name: Check out code
@@ -61,7 +74,7 @@ jobs:
         container-image: ["go-ci-oldstable", "go-ci-stable", "go-ci-unstable"]
 
     container:
-      image: "index.docker.io/atc0005/go-ci:${{ matrix.container-image}}"
+      image: "ghcr.io/atc0005/go-ci:${{ matrix.container-image}}"
 
     steps:
       - name: Check out code
@@ -80,7 +93,7 @@ jobs:
         container-image: ["go-ci-oldstable", "go-ci-stable", "go-ci-unstable"]
 
     container:
-      image: "index.docker.io/atc0005/go-ci:${{ matrix.container-image}}"
+      image: "ghcr.io/atc0005/go-ci:${{ matrix.container-image}}"
 
     steps:
       - name: Print go version
diff --git a/.github/workflows/lint-and-build-using-make.yml b/.github/workflows/lint-and-build-using-make.yml
index ac5f35a7..a1f5939a 100644
--- a/.github/workflows/lint-and-build-using-make.yml
+++ b/.github/workflows/lint-and-build-using-make.yml
@@ -31,7 +31,8 @@ jobs:
     # Default: 360 minutes
     timeout-minutes: 10
     container:
-      image: "index.docker.io/golang:latest"
+      # Use (lightly touched) mirror of current "vanilla" upstream golang image
+      image: "ghcr.io/atc0005/go-ci:go-ci-stable-mirror-build"
 
     steps:
       - name: Print go version
@@ -67,7 +68,8 @@ jobs:
     # Default: 360 minutes
     timeout-minutes: 10
     container:
-      image: "index.docker.io/golang:latest"
+      # Use (lightly touched) mirror of current "vanilla" upstream golang image
+      image: "ghcr.io/atc0005/go-ci:go-ci-stable-mirror-build"
 
     steps:
       - name: Print go version
diff --git a/.github/workflows/lint-and-test-only.yml b/.github/workflows/lint-and-test-only.yml
index 3fa4ae63..cbc28f00 100644
--- a/.github/workflows/lint-and-test-only.yml
+++ b/.github/workflows/lint-and-test-only.yml
@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     container:
-      image: index.docker.io/atc0005/go-ci:go-ci-lint-only
+      image: ghcr.io/atc0005/go-ci:go-ci-lint-only
 
     steps:
       - name: Check out code
diff --git a/.github/workflows/lint-docker-files.yml b/.github/workflows/lint-docker-files.yml
index d80f1911..fb4b6fdf 100644
--- a/.github/workflows/lint-docker-files.yml
+++ b/.github/workflows/lint-docker-files.yml
@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     container:
-      image: index.docker.io/hadolint/hadolint:latest-debian
+      image: ghcr.io/hadolint/hadolint:latest-debian
 
     steps:
       - name: Check out code