diff --git a/content/build/cache/backends/s3.md b/content/build/cache/backends/s3.md
index c6ef5b7c0d..e91db93b1b 100644
--- a/content/build/cache/backends/s3.md
+++ b/content/build/cache/backends/s3.md
@@ -31,32 +31,39 @@ $ docker buildx build --push -t <user>/<image> \
 The following table describes the available CSV parameters that you can pass to
 `--cache-to` and `--cache-from`.
 
-| Name                | Option                  | Type        | Default | Description                                   |
-| ------------------- | ----------------------- | ----------- | ------- | --------------------------------------------- |
-| `region`            | `cache-to`,`cache-from` | String      |         | Geographic location.                          |
-| `bucket`            | `cache-to`,`cache-from` | String      |         | Name of the S3 bucket used for caching        |
-| `name`              | `cache-to`,`cache-from` | String      |         | Name of the cache image                       |
-| `access_key_id`     | `cache-to`,`cache-from` | String      |         | See [authentication][1]                       |
-| `secret_access_key` | `cache-to`,`cache-from` | String      |         | See [authentication][1]                       |
-| `session_token`     | `cache-to`,`cache-from` | String      |         | See [authentication][1]                       |
-| `mode`              | `cache-to`              | `min`,`max` | `min`   | Cache layers to export, see [cache mode][2].  |
-| `ignore-error`      | `cache-to`              | Boolean     | `false` | Ignore errors caused by failed cache exports. |
+| Name                | Option                  | Type        | Default | Description                                                |
+| ------------------- | ----------------------- | ----------- | ------- | ---------------------------------------------------------- |
+| `region`            | `cache-to`,`cache-from` | String      |         | Requried. Geographic location.                             |
+| `bucket`            | `cache-to`,`cache-from` | String      |         | Required. Name of the S3 bucket.                           |
+| `name`              | `cache-to`,`cache-from` | String      |         | Name of the cache image.                                   |
+| `endpoint_url`      | `cache-to`,`cache-from` | String      |         | Endpoint of the S3 bucket.                                 |
+| `blobs_prefix`      | `cache-to`,`cache-from` | String      |         | Prefix to prepend to blob filenames.                       |
+| `manifests_prefix`  | `cache-to`,`cache-from` | String      |         | Prefix to prepend on manifest filenames.                   |
+| `use_path_style`    | `cache-to`,`cache-from` | Boolean     | `false` | When `true`, uses `bucket` in the URL instead of hostname. |
+| `access_key_id`     | `cache-to`,`cache-from` | String      |         | See [authentication][1].                                   |
+| `secret_access_key` | `cache-to`,`cache-from` | String      |         | See [authentication][1].                                   |
+| `session_token`     | `cache-to`,`cache-from` | String      |         | See [authentication][1].                                   |
+| `mode`              | `cache-to`              | `min`,`max` | `min`   | Cache layers to export, see [cache mode][2].               |
+| `ignore-error`      | `cache-to`              | Boolean     | `false` | Ignore errors caused by failed cache exports.              |
 
 [1]: #authentication
-[2]: index.md#cache-mode
+[2]: _index.md#cache-mode
 
 ## Authentication
 
-`access_key_id`, `secret_access_key`, and `session_token`, if left unspecified,
-are read from environment variables on the BuildKit server following the scheme
-for the [AWS Go SDK](https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/configuring-sdk.html).
-The environment variables are read from the server, not the Buildx client.
+Buildx can reuse existing AWS credentials, configured either using a
+credentials file or environment variables, for pushing and pulling cache to S3.
+Alternatively, you can use the `access_key_id`, `secret_access_key`, and
+`session_token` attributes to specify credentials directly on the CLI.
 
-<!-- FIXME: update once https://github.com/docker/buildx/pull/1294 is released -->
+Refer to [AWS Go SDK, Specifying Credentials][3] for details about
+authentication using environment variables and credentials file.
+
+[3]: https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/configuring-sdk.html#specifying-credentials
 
 ## Further reading
 
-For an introduction to caching see [Optimizing builds with cache](../index.md).
+For an introduction to caching see [Optimizing builds with cache](../_index.md).
 
 For more information on the `s3` cache backend, see the
 [BuildKit README](https://github.com/moby/buildkit#s3-cache-experimental).