diff --git a/.github/workflows/docker-merge-tags.yml b/.github/workflows/docker-merge-tags.yml
index a5bf9acc..356dbde2 100644
--- a/.github/workflows/docker-merge-tags.yml
+++ b/.github/workflows/docker-merge-tags.yml
@@ -56,13 +56,13 @@ jobs:
         shell: bash
 
       - name: Login to Docker Hub 🔐
-        if: github.ref == 'refs/heads/main' || github.event_name == 'schedule'
+        if: github.repository == 'jupyter/docker-stacks' && (github.ref == 'refs/heads/main' || github.event_name == 'schedule')
         uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Merge tags for the images 🔀
-        if: github.ref == 'refs/heads/main' || github.event_name == 'schedule'
+        if: github.repository == 'jupyter/docker-stacks' && (github.ref == 'refs/heads/main' || github.event_name == 'schedule')
         run: python3 -m tagging.merge_tags --short-image-name ${{ inputs.image }} --tags-dir /tmp/tags/
         shell: bash
diff --git a/.github/workflows/docker-tag-manifest-push.yml b/.github/workflows/docker-tag-manifest-push.yml
index 5078d3bc..b52c3db7 100644
--- a/.github/workflows/docker-tag-manifest-push.yml
+++ b/.github/workflows/docker-tag-manifest-push.yml
@@ -38,7 +38,7 @@ jobs:
           platform: ${{ inputs.platform }}
 
       - name: Login to Docker Hub 🔐
-        if: github.ref == 'refs/heads/main' || github.event_name == 'schedule'
+        if: github.repository == 'jupyter/docker-stacks' && (github.ref == 'refs/heads/main' || github.event_name == 'schedule')
         uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -53,6 +53,6 @@ jobs:
         run: python3 -m tagging.apply_tags --short-image-name ${{ inputs.image }} --tags-dir /tmp/tags/ --platform ${{ inputs.platform }} --owner ${{ env.OWNER }}
 
       - name: Push Images to Docker Hub 📤
-        if: github.ref == 'refs/heads/main' || github.event_name == 'schedule'
+        if: github.repository == 'jupyter/docker-stacks' && (github.ref == 'refs/heads/main' || github.event_name == 'schedule')
         run: docker push --all-tags ${{ env.OWNER }}/${{ inputs.image }}
         shell: bash
diff --git a/.github/workflows/docker-wiki-update.yml b/.github/workflows/docker-wiki-update.yml
index 032baaaa..a05b93c7 100644
--- a/.github/workflows/docker-wiki-update.yml
+++ b/.github/workflows/docker-wiki-update.yml
@@ -39,7 +39,7 @@ jobs:
         shell: bash
 
       - name: Push Wiki to GitHub 📤
-        if: github.ref == 'refs/heads/main' || github.event_name == 'schedule'
+        if: github.repository == 'jupyter/docker-stacks' && (github.ref == 'refs/heads/main' || github.event_name == 'schedule')
         uses: stefanzweifel/git-auto-commit-action@3ea6ae190baf489ba007f7c92608f33ce20ef04a # v4.16.0
         with:
           commit_message: "Automated wiki publish for ${{ github.sha }}"
diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 9266a640..ec1d5a61 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -25,7 +25,6 @@ on:
 jobs:
   build-docs:
     name: Build Sphinx Documentation
-    if: github.event_name != 'schedule' || (github.event_name == 'schedule' && github.repository == 'jupyter/docker-stacks')
     runs-on: ubuntu-latest
     permissions:
       contents: write