diff --git a/docs/03-github/03-test-runner.mdx b/docs/03-github/03-test-runner.mdx
index c10ff94e..ed9c6d09 100644
--- a/docs/03-github/03-test-runner.mdx
+++ b/docs/03-github/03-test-runner.mdx
@@ -362,6 +362,18 @@ This is useful if your manifest has a dependency on a private GitHub repo.
 
 _**required:** `false`_ _**default:** ``_
 
+#### sshPublicKeysDirectoryPath
+
+SSH directory path to mount in the container on `~/.ssh`. Must be used with `sshAgent`.
+
+It is recommended to have only public keys in this directory, and rely on `sshAgent` to manage
+private keys.
+
+This is useful if your manifest has a dependency on multiple private GitHub repos and you need to
+use multiple SSH deploy keys.
+
+_**required:** `false`_ _**default:** ``_
+
 #### gitPrivateToken
 
 GitHub Private Access Token (PAT) to pull from GitHub.
diff --git a/docs/03-github/04-builder.mdx b/docs/03-github/04-builder.mdx
index 8f33c0a9..e99fd818 100644
--- a/docs/03-github/04-builder.mdx
+++ b/docs/03-github/04-builder.mdx
@@ -376,6 +376,18 @@ This is useful if your manifest has a dependency on a private GitHub repo.
 
 _**required:** `false`_ _**default:** `""`_
 
+#### sshPublicKeysDirectoryPath
+
+SSH directory path to mount in the container on `~/.ssh`. Must be used with `sshAgent`.
+
+It is recommended to have only public keys in this directory, and rely on `sshAgent` to manage
+private keys.
+
+This is useful if your manifest has a dependency on multiple private GitHub repos and you need to
+use multiple SSH deploy keys.
+
+_**required:** `false`_ _**default:** ``_
+
 #### gitPrivateToken
 
 Github private token to pull from github.
@@ -505,6 +517,47 @@ steps:
       sshAgent: ${{ env.SSH_AUTH_SOCK }}
 ```
 
+### Multiple private Github repositories
+
+[GitHub Deploy Keys](https://docs.github.com/en/authentication/connecting-to-github-with-ssh/managing-deploy-keys#deploy-keys)
+are SSH keys that can only be set up on repository level. If you have multiple private repositories
+in your packages/manifest.json, you will need to add a Github Deploy Key for each one, and use the
+`webfactory/ssh-agent` action to manage them and use the right SSH key for each repository.
+
+In order for `webfactory/ssh-agent` to work inside the container, you will need to upload the public
+keys, SSH config and set the git url mirroring configurations in the container. You can do that by
+using `sshPublicKeysDirectoryPath` and setting the `GIT_CONFIG_EXTENSIONS` environment variable:
+
+```yaml
+- uses: webfactory/ssh-agent@v0.8.0
+  with:
+  ssh-private-key: |
+    ${{ secrets.FIRST_KEY }}
+    ${{ secrets.NEXT_KEY }}
+    ${{ secrets.ANOTHER_KEY }}
+
+- name: Prepare SSH config for unity builder
+  run: |
+    mkdir $HOME/.ssh_docker
+    cp $HOME/.ssh/config $HOME/.ssh_docker/
+    cp $HOME/.ssh/key* $HOME/.ssh_docker/
+    cp $HOME/.ssh/known_hosts $HOME/.ssh_docker/
+    sed -i 's/\/home\/runner/\/root/g' $HOME/.ssh_docker/config
+    sudo chown -R root:root $HOME/.ssh_docker
+    GIT_CONFIG_EXTENSIONS=$(git config --list | grep '^url\.')
+    {
+      echo 'GIT_CONFIG_EXTENSIONS<<EOF'
+      echo "$GIT_CONFIG_EXTENSIONS"
+      echo EOF
+    } >> "$GITHUB_ENV"
+  shell: bash
+
+- uses: game-ci/unity-builder@v3
+  with:
+    sshAgent: ${{ env.SSH_AUTH_SOCK }}
+    sshPublicKeysDirectoryPath: ${{ env.HOME }}/.ssh_docker
+```
+
 ## UPM authentication using .upmconfig.toml
 
 Unity requires an .upmconfig.toml to exist in the home directory to authenticate and download