diff --git a/packages/reffuse/src/ReffuseContext.tsx b/packages/reffuse/src/ReffuseContext.tsx
index c6b19a1..e00f014 100644
--- a/packages/reffuse/src/ReffuseContext.tsx
+++ b/packages/reffuse/src/ReffuseContext.tsx
@@ -58,18 +58,20 @@ export function useMergeAll<T extends Array<unknown>>(
     return React.useMemo(() => Context.mergeAll(...values), values)
 }
 
-export function useMergeAllLayers<
-    const Contexts extends Array.NonEmptyReadonlyArray<ReffuseContext<any>>
->(
-    ...contexts: Contexts
-): Layer.Layer<{ [K in keyof Contexts]: R<Contexts[K]> }[number]> {
-    const values = Array.map(contexts, v => React.use(v.Context))
+/** TODO: find a way to make 'contexts' a NonEmptyArray */
+export function useMergeAllLayers<T extends Array<unknown>>(
+    ...contexts: [...{ [K in keyof T]: ReffuseContext<T[K]> }]
+): Layer.Layer<T[number]> {
+    const values = Array.map(
+        contexts as Array.NonEmptyArray<ReffuseContext<T[number]>>,
+        v => React.use(v.Context),
+    )
 
     return React.useMemo(() => Layer.mergeAll(
         ...Array.map(values, context => Layer.effectContext(Effect.succeed(context)))
     ) as Layer.Layer<any>, values)
 }
 
-declare const context1: ReffuseContext<never>
-declare const context2: ReffuseContext<"prout">
-const res = useMergeAll(context1, context2)
+// declare const context1: ReffuseContext<never>
+// declare const context2: ReffuseContext<"prout">
+// const res = useMergeAllLayers(context1, context2)