diff --git a/.github/workflows/uffizzi-build.yml b/.github/workflows/uffizzi-build.yml
index 4227cd439..944bd95e8 100644
--- a/.github/workflows/uffizzi-build.yml
+++ b/.github/workflows/uffizzi-build.yml
@@ -58,7 +58,7 @@ jobs:
         uses: docker/setup-buildx-action@v2
       - name: Generate UUID image name
         id: uuid
-        run: echo "UUID_TAG_APP=$(uuidgen)" >> $GITHUB_ENV
+        run: echo "UUID_TAG_APP=livebook-$(uuidgen --time)" >> $GITHUB_ENV
       - name: Docker metadata
         id: meta
         uses: docker/metadata-action@v3
diff --git a/.github/workflows/uffizzi-preview.yml b/.github/workflows/uffizzi-preview.yml
index 7ff238746..f8e833e67 100644
--- a/.github/workflows/uffizzi-preview.yml
+++ b/.github/workflows/uffizzi-preview.yml
@@ -13,8 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
     outputs:
-      compose-file-cache-key: ${{ env.COMPOSE_FILE_HASH }}
-      pr-number: ${{ env.PR_NUMBER }}
+      compose-file-cache-key: ${{ steps.hash.outputs.COMPOSE_FILE_HASH }}
+      git-ref: ${{ steps.event.outputs.GIT_REF }}
+      pr-number: ${{ steps.event.outputs.PR_NUMBER }}
+      action: ${{ steps.event.outputs.ACTION }}
     steps:
       - name: "Download artifacts"
         # Fetch output (zip archive) from the workflow run that triggered this workflow.
@@ -41,33 +43,34 @@ jobs:
             let fs = require('fs');
             fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/preview-spec.zip`, Buffer.from(download.data));
       - name: "Unzip artifact"
-        run: unzip preview-spec.zip
+        run: unzip preview-spec.zip event.json
       - name: Read Event into ENV
+        id: event
         run: |
-          echo 'EVENT_JSON<<EOF' >> $GITHUB_ENV
-          cat event.json >> $GITHUB_ENV
-          echo 'EOF' >> $GITHUB_ENV
+          echo PR_NUMBER=$(jq '.number | tonumber' < event.json) >> $GITHUB_OUTPUT
+          echo ACTION=$(jq --raw-output '.action | tostring | [scan("\\w+")][0]' < event.json) >> $GITHUB_OUTPUT
+          echo GIT_REF=$(jq --raw-output '.pull_request.head.sha | tostring | [scan("\\w+")][0]' < event.json) >> $GITHUB_OUTPUT
       - name: Hash Rendered Compose File
         id: hash
         # If the previous workflow was triggered by a PR close event, we will not have a compose file artifact.
-        if: ${{ fromJSON(env.EVENT_JSON).action != 'closed' }}
-        run: echo "COMPOSE_FILE_HASH=$(md5sum docker-compose.rendered.yml | awk '{ print $1 }')" >> $GITHUB_ENV
+        if: ${{ steps.event.outputs.ACTION != 'closed' }}
+        run: |
+          unzip preview-spec.zip docker-compose.rendered.yml
+          echo "COMPOSE_FILE_HASH=$(md5sum docker-compose.rendered.yml | awk '{ print $1 }')" >> $GITHUB_OUTPUT
       - name: Cache Rendered Compose File
-        if: ${{ fromJSON(env.EVENT_JSON).action != 'closed' }}
+        if: ${{ steps.event.outputs.ACTION != 'closed' }}
         uses: actions/cache@v3
         with:
           path: docker-compose.rendered.yml
-          key: ${{ env.COMPOSE_FILE_HASH }}
-
-      - name: Read PR Number From Event Object
-        id: pr
-        run: echo "PR_NUMBER=${{ fromJSON(env.EVENT_JSON).number }}" >> $GITHUB_ENV
+          key: ${{ steps.hash.outputs.COMPOSE_FILE_HASH }}
 
       - name: DEBUG - Print Job Outputs
         if: ${{ runner.debug }}
         run: |
-          echo "PR number: ${{ env.PR_NUMBER }}"
-          echo "Compose file hash: ${{ env.COMPOSE_FILE_HASH }}"
+          echo "PR number: ${{ steps.event.outputs.PR_NUMBER }}"
+          echo "Git Ref: ${{ steps.event.outputs.GIT_REF }}"
+          echo "Action: ${{ steps.event.outputs.ACTION }}"
+          echo "Compose file hash: ${{ steps.hash.outputs.COMPOSE_FILE_HASH }}"
           cat event.json
 
   deploy-uffizzi-preview: