diff --git a/.github/actions/generate-sandboxes-composite-action.yml b/.github/actions/generate-sandboxes-composite-action/action.yml
similarity index 88%
rename from .github/actions/generate-sandboxes-composite-action.yml
rename to .github/actions/generate-sandboxes-composite-action/action.yml
index d47166c73ec4..e2d84a2c283d 100644
--- a/.github/actions/generate-sandboxes-composite-action.yml
+++ b/.github/actions/generate-sandboxes-composite-action/action.yml
@@ -6,11 +6,6 @@ inputs:
     description: The destination branch to generate sandboxes to in the storybookjs/sandboxes repository
     required: true
 
-defaults:
-  run:
-    shell: bash
-    working-directory: ./code
-
 runs:
   using: "composite"
   steps:
@@ -19,34 +14,42 @@ runs:
         node-version-file: ".nvmrc"
 
     - name: Setup git user
+      shell: bash
       run: |
         git config --global user.name "storybook-bot"
         git config --global user.email "32066757+storybook-bot@users.noreply.github.com"
 
     - name: Install dependencies
+      shell: bash
       working-directory: ./scripts
       env:
-        YARN_ENABLE_IMMUTABLE_INSTALLS: false
+        YARN_ENABLE_IMMUTABLE_INSTALLS: "false"
       run: node --experimental-modules ./check-dependencies.js
 
     - name: Compile Storybook libraries
+      shell: bash
       run: yarn task --task compile --start-from=auto --no-link
 
     - name: Publish to local registry
+      shell: bash
       run: yarn local-registry --publish
 
     - name: Run local registry
+      shell: bash
       run: yarn local-registry --open &
 
     - name: Wait for registry
+      shell: bash
       run: yarn wait-on tcp:127.0.0.1:6001
 
     - name: Generate
+      shell: bash
       env:
-        CLEANUP_SANDBOX_NODE_MODULES: true
+        CLEANUP_SANDBOX_NODE_MODULES: "true"
       run: yarn generate-sandboxes --local-registry
 
     - name: Publish
+      shell: bash
       run: yarn publish-sandboxes --remote=https://storybook-bot:${{ secrets.PAT_STORYBOOK_BOT}}@github.com/storybookjs/sandboxes.git --push --branch=${{ inputs.destination-branch }}
 
     - name: The job has failed