diff --git a/packages/effect-fc-next/src/Async.ts b/packages/effect-fc-next/src/Async.ts
index 6495308..58b7f5a 100644
--- a/packages/effect-fc-next/src/Async.ts
+++ b/packages/effect-fc-next/src/Async.ts
@@ -1,5 +1,5 @@
 /** biome-ignore-all lint/complexity/useArrowFunction: necessary for class prototypes */
-import { Context, Effect, type Equivalence, Function, Predicate, Scope } from "effect"
+import { type Context, Effect, type Equivalence, Function, Predicate, Scope } from "effect"
 import * as React from "react"
 import * as Component from "./Component.js"
 
@@ -45,7 +45,7 @@ export const AsyncPrototype: AsyncPrototype = Object.freeze({
 
         return ({ fallback, name, ...props }: AsyncProps) => {
             const promise = Effect.runPromiseWith(contextRef.current)(
-                Effect.andThen(
+                Effect.flatMap(
                     Component.useScope([], this),
                     scope => Effect.provideService(this.body(props as P), Scope.Scope, scope),
                 )
diff --git a/packages/effect-fc-next/src/Component.ts b/packages/effect-fc-next/src/Component.ts
index aadc0a9..bec0610 100644
--- a/packages/effect-fc-next/src/Component.ts
+++ b/packages/effect-fc-next/src/Component.ts
@@ -59,7 +59,7 @@ export const ComponentImplPrototype: ComponentImplPrototype<any, any> = Object.f
         contextRef: React.RefObject<Context.Context<Exclude<R, Scope.Scope>>>,
     ) {
         return (props: P) => Effect.runSyncWith(contextRef.current)(
-            Effect.andThen(
+            Effect.flatMap(
                 useScope([], this),
                 scope => Effect.provideService(this.body(props), Scope.Scope, scope),
             )
diff --git a/packages/effect-fc-next/src/ReactRuntime.ts b/packages/effect-fc-next/src/ReactRuntime.ts
index 2c40a78..4413e3e 100644
--- a/packages/effect-fc-next/src/ReactRuntime.ts
+++ b/packages/effect-fc-next/src/ReactRuntime.ts
@@ -29,16 +29,16 @@ export const preludeLayer: Layer.Layer<
 )
 
 
-export const isReactRuntime = (u: unknown): u is ReactRuntime<unknown, unknown> => Predicate.hasProperty(u, TypeId)
+export const isReactRuntime = (u: unknown): u is ReactRuntime<unknown, unknown> => Predicate.hasProperty(u, ReactRuntimeTypeId)
 
 export const make = <R, ER>(
     layer: Layer.Layer<R, ER>,
     memoMap?: Layer.MemoMap,
-): ReactRuntime<Layer.Success<typeof layer> | R, ER> => Object.setPrototypeOf(
+): ReactRuntime<Layer.Success<typeof preludeLayer> | R, ER> => Object.setPrototypeOf(
     Object.assign(function() {}, {
         runtime: ManagedRuntime.make(
             Layer.merge(layer, preludeLayer),
-            memoMap,
+            { memoMap },
         ),
         // biome-ignore lint/style/noNonNullAssertion: context initialization
         context: React.createContext<Context.Context<R>>(null!),