diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f6df348b72140..d78d492127ad8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -145,6 +145,10 @@ jobs:
       - name: install awscli
         run: src/ci/scripts/install-awscli.sh
 
+      - if: contains(matrix.os, 'codebuild-ubuntu')
+        name: Install sotftware for codebuild
+        run: chmod +x src/ci/scripts/ubuntu-codebuild.sh && ./src/ci/scripts/ubuntu-codebuild.sh
+
       - name: install sccache
         run: src/ci/scripts/install-sccache.sh
 
@@ -174,6 +178,8 @@ jobs:
 
       - name: enable ipv6 on Docker
         run: src/ci/scripts/enable-docker-ipv6.sh
+        # Don't run on codebuild because systemctl is not available
+        if: ${{ !contains(matrix.os, 'codebuild-ubuntu') }}
 
       # Disable automatic line ending conversion (again). On Windows, when we're
       # installing dependencies, something switches the git configuration directory or
diff --git a/src/ci/docker/run.sh b/src/ci/docker/run.sh
index d554186df4cfe..82f17f82261b8 100755
--- a/src/ci/docker/run.sh
+++ b/src/ci/docker/run.sh
@@ -282,8 +282,12 @@ else
     # LOCAL_USER_ID will map to a different subuid range on the host.
     # The "keep-id" mode maps the current UID directly into the container.
     args="$args --env NO_CHANGE_USER=1 --userns=keep-id"
-  else
+  elif [[ "$id" != 0 ]]; then
     args="$args --env LOCAL_USER_ID=$id"
+  else
+    # If we're running as root, we don't want to run the container as root,
+    # so we set id `1001` instead of `0`.
+    args="$args --env LOCAL_USER_ID=1001"
   fi
 fi
 
diff --git a/src/ci/github-actions/calculate-job-matrix.py b/src/ci/github-actions/calculate-job-matrix.py
index 7de6d5fcd5f75..969acd992dcc0 100755
--- a/src/ci/github-actions/calculate-job-matrix.py
+++ b/src/ci/github-actions/calculate-job-matrix.py
@@ -176,6 +176,21 @@ def format_run_type(run_type: WorkflowRunType) -> str:
         raise AssertionError()
 
 
+# Add new function before main:
+def substitute_github_vars(jobs: list) -> list:
+    """Replace GitHub context variables with environment variables in job configs."""
+    for job in jobs:
+        if "os" in job:
+            job["os"] = job["os"].replace(
+                "${{ github.run_id }}",
+                os.environ["GITHUB_RUN_ID"]
+            ).replace(
+                "${{ github.run_attempt }}",
+                os.environ["GITHUB_RUN_ATTEMPT"]
+            )
+    return jobs
+
+
 if __name__ == "__main__":
     logging.basicConfig(level=logging.INFO)
 
@@ -194,6 +209,8 @@ def format_run_type(run_type: WorkflowRunType) -> str:
     if run_type is not None:
         jobs = calculate_jobs(run_type, data)
     jobs = skip_jobs(jobs, channel)
+    jobs = substitute_github_vars(jobs)
+
 
     if not jobs:
         raise Exception("Scheduled job list is empty, this is an error")
diff --git a/src/ci/github-actions/jobs.yml b/src/ci/github-actions/jobs.yml
index 2ea37c168dd3c..10756dd4951cd 100644
--- a/src/ci/github-actions/jobs.yml
+++ b/src/ci/github-actions/jobs.yml
@@ -46,6 +46,10 @@ runners:
   - &job-aarch64-linux
     os: ubuntu-22.04-arm64-8core-32gb
 
+  - &job-linux-8c-codebuild
+    os: codebuild-ubuntu-22-8c-${{ github.run_id }}-${{ github.run_attempt }}
+    <<: *base-job
+
 envs:
   env-x86_64-apple-tests: &env-x86_64-apple-tests
     SCRIPT: ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
@@ -237,7 +241,7 @@ auto:
     <<: *job-linux-4c
 
   - image: x86_64-gnu
-    <<: *job-linux-4c
+    <<: *job-linux-8c-codebuild
 
   # This job ensures commits landing on nightly still pass the full
   # test suite on the stable channel. There are some UI tests that
diff --git a/src/ci/run.sh b/src/ci/run.sh
index b874f71832d73..99dc2e6e6a009 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -2,12 +2,15 @@
 
 set -e
 
+echo "Running inside src/ci/run.sh script"
+
 if [ -n "$CI_JOB_NAME" ]; then
   echo "[CI_JOB_NAME=$CI_JOB_NAME]"
 fi
 
 if [ "$NO_CHANGE_USER" = "" ]; then
   if [ "$LOCAL_USER_ID" != "" ]; then
+    echo "Starting with UID: $LOCAL_USER_ID"
     id -u user &>/dev/null || useradd --shell /bin/bash -u $LOCAL_USER_ID -o -c "" -m user
     export HOME=/home/user
     unset LOCAL_USER_ID
@@ -21,7 +24,9 @@ if [ "$NO_CHANGE_USER" = "" ]; then
     # For NO_CHANGE_USER done in the small number of Dockerfiles affected.
     echo -e '[safe]\n\tdirectory = *' > /home/user/.gitconfig
 
+    echo "Switching to user"
     exec su --preserve-environment -c "env PATH=$PATH \"$0\"" user
+    echo "whoami: $(whoami)"
   fi
 fi
 
diff --git a/src/ci/scripts/enable-docker-ipv6.sh b/src/ci/scripts/enable-docker-ipv6.sh
index 03d5a75e24e27..fb09a399d9bec 100755
--- a/src/ci/scripts/enable-docker-ipv6.sh
+++ b/src/ci/scripts/enable-docker-ipv6.sh
@@ -7,6 +7,12 @@ IFS=$'\n\t'
 
 source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
 
+# Print docker version
+docker --version
+lsb_release -a
+echo "is docker active"
+systemctl is-active docker
+
 if isLinux; then
     sudo mkdir -p /etc/docker
     echo '{"ipv6":true,"fixed-cidr-v6":"fd9a:8454:6789:13f7::/64"}' \
diff --git a/src/ci/scripts/run-build-from-ci.sh b/src/ci/scripts/run-build-from-ci.sh
index 55e75800d91c4..90d6894c7c234 100755
--- a/src/ci/scripts/run-build-from-ci.sh
+++ b/src/ci/scripts/run-build-from-ci.sh
@@ -17,7 +17,9 @@ echo "::add-matcher::src/ci/github-actions/problem_matchers.json"
 # the environment
 rustup self uninstall -y || true
 if [ -z "${IMAGE+x}" ]; then
+    echo "Running ci/run.sh"
     src/ci/run.sh
 else
+    echo "Running docker/run.sh with image ${IMAGE}"
     src/ci/docker/run.sh "${IMAGE}"
 fi
diff --git a/src/ci/scripts/ubuntu-codebuild.sh b/src/ci/scripts/ubuntu-codebuild.sh
new file mode 100644
index 0000000000000..da5371965de46
--- /dev/null
+++ b/src/ci/scripts/ubuntu-codebuild.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# apt-get update
+# apt-get install -y docker-buildx