diff --git a/.changeset/chilled-chefs-notice.md b/.changeset/chilled-chefs-notice.md
new file mode 100644
index 0000000000..a12babb2a4
--- /dev/null
+++ b/.changeset/chilled-chefs-notice.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder-backend-module-rails': patch
+---
+
+Make `containerRunner` argument optional
diff --git a/.changeset/good-lemons-lick.md b/.changeset/good-lemons-lick.md
new file mode 100644
index 0000000000..9321ae6b82
--- /dev/null
+++ b/.changeset/good-lemons-lick.md
@@ -0,0 +1,14 @@
+---
+'@backstage/plugin-scaffolder-backend-module-confluence-to-markdown': patch
+'@backstage/plugin-scaffolder-backend-module-cookiecutter': patch
+'@backstage/plugin-scaffolder-backend-module-bitbucket': patch
+'@backstage/plugin-scaffolder-backend-module-gerrit': patch
+'@backstage/plugin-scaffolder-backend-module-github': patch
+'@backstage/plugin-scaffolder-backend-module-gitlab': patch
+'@backstage/plugin-scaffolder-backend-module-sentry': patch
+'@backstage/plugin-scaffolder-backend-module-yeoman': patch
+'@backstage/plugin-scaffolder-backend-module-azure': patch
+'@backstage/plugin-scaffolder-backend-module-rails': patch
+---
+
+Exporting a module for the new Backend System on `/alpha`
diff --git a/.changeset/wild-owls-doubt.md b/.changeset/wild-owls-doubt.md
new file mode 100644
index 0000000000..8a45c0a9e9
--- /dev/null
+++ b/.changeset/wild-owls-doubt.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder-backend': minor
+---
+
+The built-in module list has been trimmed down. Provider specific modules should now be installed with `backend.add` to provide additional actions to the scaffolder.
diff --git a/plugins/scaffolder-backend/src/ScaffolderPlugin.ts b/plugins/scaffolder-backend/src/ScaffolderPlugin.ts
index beabaa50aa..4da725fde5 100644
--- a/plugins/scaffolder-backend/src/ScaffolderPlugin.ts
+++ b/plugins/scaffolder-backend/src/ScaffolderPlugin.ts
@@ -32,7 +32,18 @@ import {
   scaffolderTaskBrokerExtensionPoint,
   scaffolderTemplatingExtensionPoint,
 } from '@backstage/plugin-scaffolder-node/alpha';
-import { createBuiltinActions } from './scaffolder';
+import {
+  createCatalogRegisterAction,
+  createCatalogWriteAction,
+  createDebugLogAction,
+  createFetchCatalogEntityAction,
+  createFetchPlainAction,
+  createFetchPlainFileAction,
+  createFetchTemplateAction,
+  createFilesystemDeleteAction,
+  createFilesystemRenameAction,
+  createWaitAction,
+} from './scaffolder';
 import { createRouter } from './service/router';
 
 /**
@@ -91,20 +102,39 @@ export const scaffolderPlugin = createBackendPlugin({
         permissions,
       }) {
         const log = loggerToWinstonLogger(logger);
+        const integrations = ScmIntegrations.fromConfig(config);
 
         const actions = [
+          // actions provided from other modules
           ...addedActions,
-          ...createBuiltinActions({
-            integrations: ScmIntegrations.fromConfig(config),
-            catalogClient,
+
+          // built-in actions for the scaffolder
+          createFetchPlainAction({
+            reader,
+            integrations,
+          }),
+          createFetchPlainFileAction({
+            reader,
+            integrations,
+          }),
+          createFetchTemplateAction({
+            integrations,
             reader,
-            config,
             additionalTemplateFilters,
             additionalTemplateGlobals,
           }),
+          createDebugLogAction(),
+          createWaitAction(),
+          // todo(blam): maybe these should be a -catalog module?
+          createCatalogRegisterAction({ catalogClient, integrations }),
+          createFetchCatalogEntityAction({ catalogClient }),
+          createCatalogWriteAction(),
+          createFilesystemDeleteAction(),
+          createFilesystemRenameAction(),
         ];
 
         const actionIds = actions.map(action => action.id).join(', ');
+
         log.info(
           `Starting scaffolder with the following actions enabled ${actionIds}`,
         );