diff --git a/action.yml b/action.yml
index 7f58660e..25d2c3ae 100644
--- a/action.yml
+++ b/action.yml
@@ -261,6 +261,10 @@ inputs:
     default: 'false'
     required: false
     description: 'Skip the activation/deactivation of Unity. This assumes Unity is already activated.'
+  scopedRegistryUrl:
+    required: false
+    default: ''
+    description: 'Scoped registry to use for resolving package dependencies. Only applicable if packageMode is true.'
 
 outputs:
   volume:
diff --git a/dist/index.js b/dist/index.js
index ea151c67..c13a1440 100644
Binary files a/dist/index.js and b/dist/index.js differ
diff --git a/dist/index.js.map b/dist/index.js.map
index f243b1f6..cdca0fed 100644
Binary files a/dist/index.js.map and b/dist/index.js.map differ
diff --git a/dist/platforms/windows/build.ps1 b/dist/platforms/windows/build.ps1
index 0a85d346..7504bfcd 100644
--- a/dist/platforms/windows/build.ps1
+++ b/dist/platforms/windows/build.ps1
@@ -24,6 +24,40 @@ Write-Output "$('Using build path "')$($Env:BUILD_PATH)$('" to save file "')$($E
 $Env:BUILD_PATH_FULL="$Env:GITHUB_WORKSPACE\$Env:BUILD_PATH"
 $Env:CUSTOM_BUILD_PATH="$Env:BUILD_PATH_FULL\$Env:BUILD_FILE"
 
+#
+# Setup token for private package registry.
+#
+
+if ($null -ne ${env:PRIVATE_REGISTRY_TOKEN})
+{
+  Write-Output ""
+  Write-Output "###########################"
+  Write-Output "#    Private Registry     #"
+  Write-Output "###########################"
+  Write-Output ""
+  Write-Output "Private registry token detected, creating .upmconfig.toml and .npmrc"
+
+  $UPM_CONFIG_TOML_PATH="$env:USERPROFILE\.upmconfig.toml"
+  Write-Output "Creating toml at path: $UPM_CONFIG_TOML_PATH"
+
+  #$NPMRC_PATH="$env:USERPROFILE\.npmrc"
+  #Write-Output "Creating npmrc at path: $NPMRC_PATH"
+
+@"
+[npmAuth."${env:SCOPED_REGISTRY_URL}"]
+token = "${env:PRIVATE_REGISTRY_TOKEN}"
+alwaysAuth = true
+"@ | Set-Content -Path "$env:USERPROFILE\.upmconfig.toml"
+}
+else
+{
+  Write-Output ""
+  Write-Output "###########################"
+  Write-Output "#    Test        Test     #"
+  Write-Output "###########################"
+  Write-Output ""
+}
+
 #
 # Set the build method, must reference one of:
 #
diff --git a/src/model/build-parameters.ts b/src/model/build-parameters.ts
index 8cf60d59..7ca60f5f 100644
--- a/src/model/build-parameters.ts
+++ b/src/model/build-parameters.ts
@@ -94,6 +94,8 @@ class BuildParameters {
   public cacheUnityInstallationOnMac!: boolean;
   public unityHubVersionOnMac!: string;
   public dockerWorkspacePath!: string;
+  public scopedRegistryUrl!: string;
+  public upmRegistryToken!: string;
 
   public static shouldUseRetainedWorkspaceMode(buildParameters: BuildParameters) {
     return buildParameters.maxRetainedWorkspaces > 0 && CloudRunner.lockedWorkspace !== ``;
@@ -218,6 +220,8 @@ class BuildParameters {
       cacheUnityInstallationOnMac: Input.cacheUnityInstallationOnMac,
       unityHubVersionOnMac: Input.unityHubVersionOnMac,
       dockerWorkspacePath: Input.dockerWorkspacePath,
+      scopedRegistryUrl: Input.scopedRegistryUrl,
+      upmRegistryToken: Input.upmRegistryToken,
     };
   }
 
diff --git a/src/model/image-environment-factory.ts b/src/model/image-environment-factory.ts
index 347d6944..8a77c3eb 100644
--- a/src/model/image-environment-factory.ts
+++ b/src/model/image-environment-factory.ts
@@ -35,6 +35,8 @@ class ImageEnvironmentFactory {
         name: 'USYM_UPLOAD_AUTH_TOKEN',
         value: process.env.USYM_UPLOAD_AUTH_TOKEN,
       },
+      { name: 'SCOPED_REGISTRY_URL', value: parameters.scopedRegistryUrl },
+      { name: 'PRIVATE_REGISTRY_TOKEN', value: process.env.UPM_REGISTRY_TOKEN },
       { name: 'PROJECT_PATH', value: parameters.projectPath },
       { name: 'BUILD_TARGET', value: parameters.targetPlatform },
       { name: 'BUILD_NAME', value: parameters.buildName },
diff --git a/src/model/input.ts b/src/model/input.ts
index 0e988884..340a3cca 100644
--- a/src/model/input.ts
+++ b/src/model/input.ts
@@ -241,6 +241,18 @@ class Input {
     return Input.getInput('dockerCpuLimit') ?? os.cpus().length.toString();
   }
 
+  static get scopedRegistryUrl(): string {
+    const input = Input.getInput('scopedRegistryUrl') ?? '';
+
+    return input !== '' ? input : '';
+  }
+
+  static get upmRegistryToken(): string {
+    const input = Input.getInput('UPM_REGISTRY_TOKEN') ?? '';
+
+    return input !== '' ? input : '';
+  }
+
   static get dockerMemoryLimit(): string {
     const bytesInMegabyte = 1024 * 1024;
 
diff --git a/src/model/platform-setup/setup-mac.ts b/src/model/platform-setup/setup-mac.ts
index 4566e163..794cfeb1 100644
--- a/src/model/platform-setup/setup-mac.ts
+++ b/src/model/platform-setup/setup-mac.ts
@@ -190,6 +190,8 @@ class SetupMac {
     process.env.CHOWN_FILES_TO = buildParameters.chownFilesTo;
     process.env.MANUAL_EXIT = buildParameters.manualExit.toString();
     process.env.ENABLE_GPU = buildParameters.enableGpu.toString();
+    process.env.PRIVATE_REGISTRY_TOKEN = buildParameters.upmRegistryToken;
+    process.env.SCOPED_REGISTRY_URL = buildParameters.scopedRegistryUrl;
   }
 }