add more webpack config options

packages/next/build/webpack-config.ts

@@ -364,6 +364,14 @@ export default async function getBaseWebpackConfig(
       '`experimental.serverComponents` requires React 18 to be installed.'
     )
   }
+  if (
+    config.experimental.serverComponents &&
+    !config.experimental.concurrentFeatures
+  ) {
+    throw new Error(
+      '`experimental.serverComponents` requires `experimental.concurrentFeatures` to be enabled.'
+    )
+  }
 
   const targetWeb = isEdgeRuntime || !isServer
   const hasConcurrentFeatures =
@@ -1756,6 +1764,17 @@ export default async function getBaseWebpackConfig(
       defaultLoaders,
       totalPages,
       webpack,
+      ...(hasConcurrentFeatures
+        ? {
+            // When concurrent features are enabled, there are both runtimes enabled
+            // as the server compiler. So we change the options here to make sure
+            // users can distinguish between all compilers.
+            // This can change in the future.
+            isServer: !isEdgeRuntime && isServer,
+            isEdgeServer: isEdgeRuntime && isServer,
+            isClient: !isServer,
+          }
+        : null),
     })
 
     if (!webpackConfig) {