diff --git a/cli/run/loadConfigFile.ts b/cli/run/loadConfigFile.ts
index 946d2d4752b..1d407162e7a 100644
--- a/cli/run/loadConfigFile.ts
+++ b/cli/run/loadConfigFile.ts
@@ -1,4 +1,3 @@
-import { promises as fs } from 'fs';
 import { extname, isAbsolute } from 'path';
 import { version } from 'process';
 import { pathToFileURL } from 'url';
@@ -103,8 +102,8 @@ async function getDefaultFromTranspiledConfigFile(
 	return loadConfigFromBundledFile(fileName, code);
 }
 
-async function loadConfigFromBundledFile(fileName: string, bundledCode: string): Promise<unknown> {
-	const resolvedFileName = await fs.realpath(fileName);
+function loadConfigFromBundledFile(fileName: string, bundledCode: string): unknown {
+	const resolvedFileName = require.resolve(fileName);
 	const extension = extname(resolvedFileName);
 	const defaultLoader = require.extensions[extension];
 	require.extensions[extension] = (module: NodeModule, requiredFileName: string) => {
diff --git a/src/utils/hookActions.ts b/src/utils/hookActions.ts
index 69269bbb27f..01608209f55 100644
--- a/src/utils/hookActions.ts
+++ b/src/utils/hookActions.ts
@@ -1,3 +1,4 @@
+import { EventEmitter } from 'events';
 import process from 'process';
 import { HookAction, PluginDriver } from './PluginDriver';
 
@@ -19,6 +20,13 @@ function formatAction([pluginName, hookName, args]: HookAction): string {
 	return action;
 }
 
+// We do not directly listen on process to avoid max listeners warnings for
+// complicated build processes
+const beforeExitEvent = 'beforeExit';
+const beforeExitEmitter = new EventEmitter();
+beforeExitEmitter.setMaxListeners(0);
+process.on(beforeExitEvent, () => beforeExitEmitter.emit(beforeExitEvent));
+
 export async function catchUnfinishedHookActions<T>(
 	pluginDriver: PluginDriver,
 	callback: () => Promise<T>
@@ -34,10 +42,10 @@ export async function catchUnfinishedHookActions<T>(
 				)
 			);
 		};
-		process.once('beforeExit', handleEmptyEventLoop);
+		beforeExitEmitter.once(beforeExitEvent, handleEmptyEventLoop);
 	});
 
 	const result = await Promise.race([callback(), emptyEventLoopPromise]);
-	process.off('beforeExit', handleEmptyEventLoop!);
+	beforeExitEmitter.off(beforeExitEvent, handleEmptyEventLoop!);
 	return result;
 }
diff --git a/test/cli/samples/config-cwd-case-insensitive-es6/_config.js b/test/cli/samples/config-cwd-case-insensitive-es6/_config.js
new file mode 100644
index 00000000000..8fc7b6c5aa9
--- /dev/null
+++ b/test/cli/samples/config-cwd-case-insensitive-es6/_config.js
@@ -0,0 +1,11 @@
+function toggleCase(s) {
+	return s == s.toLowerCase() ? s.toUpperCase() : s.toLowerCase();
+}
+
+module.exports = {
+	onlyWindows: true,
+	description: "can load ES6 config with cwd that doesn't match realpath",
+	command: 'rollup -c',
+	cwd: __dirname.replace(/^[A-Z]:\\/i, toggleCase),
+	execute: true
+};
diff --git a/test/cli/samples/config-cwd-case-insensitive-es6/main.js b/test/cli/samples/config-cwd-case-insensitive-es6/main.js
new file mode 100644
index 00000000000..df16c1b06b9
--- /dev/null
+++ b/test/cli/samples/config-cwd-case-insensitive-es6/main.js
@@ -0,0 +1 @@
+assert.equal( ANSWER, 42 );
diff --git a/test/cli/samples/config-cwd-case-insensitive-es6/rollup.config.js b/test/cli/samples/config-cwd-case-insensitive-es6/rollup.config.js
new file mode 100644
index 00000000000..dee04a33fb1
--- /dev/null
+++ b/test/cli/samples/config-cwd-case-insensitive-es6/rollup.config.js
@@ -0,0 +1,9 @@
+import replace from '@rollup/plugin-replace';
+
+export default {
+	input: 'main.js',
+	output: {
+		format: 'cjs'
+	},
+	plugins: [replace({ preventAssignment: true, ANSWER: 42 })]
+};