How to structure Liquid schema in Shopify Dawn to emit all variants in JSON-LD?

<!-- Fix for snippets/product-json-ld.liquid in Dawn -->
<script type="application/ld+json">
{
  "@context": "https://schema.org/",
  "@type": "Product",
  "name": {{ product.title | json }},
  "url": "{{ shop.url }}{{ product.url }}",
  "offers": [
    {%- for variant in product.variants -%}
    {
      "@type": "Offer",
      "name": {{ variant.title | json }},
      "sku": {{ variant.sku | default: variant.id | json }},
      "price": {{ variant.price | divided_by: 100.00 | json }},
      "priceCurrency": {{ cart.currency.iso_code | json }},
      "availability": "{% if variant.available %}https://schema.org/InStock{% else %}https://schema.org/OutOfStock{% endif %}",
      "url": "{{ shop.url }}{{ variant.url }}"
    }{% unless forloop.last %},{% endunless %}
    {%- endfor -%}
  ]
}
</script>