diff --git a/lib/config/builder/index.ts b/lib/config/builder/index.ts
index 84b807f..80ab296 100644
--- a/lib/config/builder/index.ts
+++ b/lib/config/builder/index.ts
@@ -1,4 +1,4 @@
-import { Config } from "./config"
+import { Config, topConfig } from "./config"
 import { List } from "./list"
 import { Value } from "./value"
 import { Variants } from "./variants"
@@ -10,4 +10,5 @@ export {
   List,
   Value,
   Variants,
+  topConfig,
 }
diff --git a/scripts/oldSpecToBuilder.ts b/scripts/oldSpecToBuilder.ts
index cdaf3a9..0c4dc34 100644
--- a/scripts/oldSpecToBuilder.ts
+++ b/scripts/oldSpecToBuilder.ts
@@ -37,7 +37,7 @@ export default async function makeFileContentFromOld(
 ) {
   const outputLines: string[] = []
   outputLines.push(`
-  import {Config, Value, List, Variants} from '${startSdk}/lib/config/builder'
+  import {Config, Value, List, Variants, topConfig} from '${startSdk}/lib/config/builder'
   import {WrapperData} from '${wrapperData}'
 `)
   const data = await inputData
@@ -45,7 +45,7 @@ export default async function makeFileContentFromOld(
   const namedConsts = new Set(["Config", "Value", "List"])
   const configName = newConst(
     "configSpec",
-    `Config.withWrapperData<WrapperData>().of(${convertInputSpecInner(data)})`,
+    `topConfig<WrapperData>()(${convertInputSpecInner(data)})`,
   )
   const configMatcherName = newConst(
     "matchConfigSpec",