diff --git a/packages/duckdb-wasm/bundle.mjs b/packages/duckdb-wasm/bundle.mjs
index 2f75d8128..428c1ee26 100644
--- a/packages/duckdb-wasm/bundle.mjs
+++ b/packages/duckdb-wasm/bundle.mjs
@@ -4,7 +4,7 @@ import path from 'path';
 import { rimrafSync } from 'rimraf';
 import mkdir from 'make-dir';
 import { fileURLToPath } from 'url';
-import ifdefPlugin from 'esbuild-ifdef'
+import ifdef from 'esbuild-plugin-ifdef'
 
 // -------------------------------
 // Current bundling strategy
@@ -111,11 +111,7 @@ fs.copyFile(path.resolve(src, 'bindings', 'duckdb-coi.wasm'), path.resolve(dist,
     // Browser bundles
 
     const pluginConfig = [
-        ifdefPlugin({
-            variables: {
-                EH_BUILD_ENABLED: ehBuildEnabled(),
-            },
-        })
+        ifdef(ehBuildEnabled() ? { EH_BUILD_ENABLED: true } : {}),
     ];
 
     console.log('[ ESBUILD ] duckdb-browser.cjs');
@@ -319,6 +315,7 @@ fs.copyFile(path.resolve(src, 'bindings', 'duckdb-coi.wasm'), path.resolve(dist,
         bundle: true,
         sourcemap: is_debug ? 'inline' : true,
         external: EXTERNALS_TEST_BROWSER,
+        plugins: pluginConfig,
     });
 
     console.log('[ ESBUILD ] tests-node.cjs');
@@ -331,8 +328,10 @@ fs.copyFile(path.resolve(src, 'bindings', 'duckdb-coi.wasm'), path.resolve(dist,
         bundle: true,
         minify: false,
         sourcemap: is_debug ? 'inline' : true,
-        // web-worker polyfill needs to be excluded from bundling due to their dynamic require messing with bundled modules
+        // web-worker polyfill needs to be excluded from
+        // bundling due to their dynamic require messing with bundled modules
         external: [...EXTERNALS_NODE, 'web-worker'],
+        plugins: pluginConfig,
     });
 
     // -------------------------------
diff --git a/packages/duckdb-wasm/package.json b/packages/duckdb-wasm/package.json
index 0f7665a48..eb0321e4b 100644
--- a/packages/duckdb-wasm/package.json
+++ b/packages/duckdb-wasm/package.json
@@ -32,6 +32,8 @@
         "@typescript-eslint/parser": "^6.7.3",
         "esbuild": "^0.18.13",
         "eslint": "^8.50.0",
+        "esbuild-ifdef": "^0.2.0",
+        "esbuild-plugin-ifdef": "^1.0.1",
         "eslint-plugin-jasmine": "^4.1.3",
         "eslint-plugin-react": "^7.33.2",
         "fast-glob": "^3.3.1",
@@ -56,8 +58,7 @@
         "typedoc": "^0.25.0",
         "typescript": "^5.1.6",
         "wasm-feature-detect": "^1.5.1",
-        "web-worker": "^1.2.0",
-        "esbuild-ifdef": "^0.2.0"
+        "web-worker": "^1.2.0"
     },
     "scripts": {
         "build:debug": "node bundle.mjs debug && tsc --emitDeclarationOnly",
diff --git a/packages/duckdb-wasm/src/targets/duckdb-browser-blocking.ts b/packages/duckdb-wasm/src/targets/duckdb-browser-blocking.ts
index 451836c0e..8d660377f 100644
--- a/packages/duckdb-wasm/src/targets/duckdb-browser-blocking.ts
+++ b/packages/duckdb-wasm/src/targets/duckdb-browser-blocking.ts
@@ -11,9 +11,9 @@ import { Logger } from '../log';
 import { DuckDBRuntime, DuckDBBindings } from '../bindings';
 import { DuckDBBundles, getPlatformFeatures } from '../platform';
 import { DuckDB as DuckDBMVP } from '../bindings/bindings_browser_mvp';
-/// #if EH_BUILD_ENABLED
+//#ifdef EH_BUILD_ENABLED
 import { DuckDB as DuckDBNext } from '../bindings/bindings_browser_eh';
-/// #endif
+//#endif
 
 export async function createDuckDB(
     bundles: DuckDBBundles,
@@ -21,12 +21,12 @@ export async function createDuckDB(
     runtime: DuckDBRuntime,
 ): Promise<DuckDBBindings> {
     const platform = await getPlatformFeatures();
-    /// #if EH_BUILD_ENABLED
+//#ifdef EH_BUILD_ENABLED
     if (platform.wasmExceptions) {
         if (bundles.eh) {
             return new DuckDBNext(logger, runtime, bundles.eh!.mainModule);
         }
     }
-    /// #endif
+//#endif
     return new DuckDBMVP(logger, runtime, bundles.mvp.mainModule);
 }
diff --git a/packages/duckdb-wasm/src/targets/duckdb-node-blocking.ts b/packages/duckdb-wasm/src/targets/duckdb-node-blocking.ts
index 679fa54e4..9b759382c 100644
--- a/packages/duckdb-wasm/src/targets/duckdb-node-blocking.ts
+++ b/packages/duckdb-wasm/src/targets/duckdb-node-blocking.ts
@@ -12,9 +12,9 @@ import { DuckDBRuntime } from '../bindings';
 import { DuckDBNodeBindings } from '../bindings/bindings_node_base';
 import { DuckDBBundles, getPlatformFeatures } from '../platform';
 import { DuckDB as DuckDBMVP } from '../bindings/bindings_node_mvp';
-/// #if EH_BUILD_ENABLED
+//#ifdef EH_BUILD_ENABLED
 import { DuckDB as DuckDBNext } from '../bindings/bindings_node_eh';
-/// #endif
+//#endif
 
 export async function createDuckDB(
     bundles: DuckDBBundles,
@@ -22,12 +22,12 @@ export async function createDuckDB(
     runtime: DuckDBRuntime,
 ): Promise<DuckDBNodeBindings> {
     const platform = await getPlatformFeatures();
-    /// #if EH_BUILD_ENABLED
+//#ifdef EH_BUILD_ENABLED
     if (platform.wasmExceptions) {
         if (bundles.eh) {
             return new DuckDBNext(logger, runtime, bundles.eh!.mainModule);
         }
     }
-    /// #endif
+//#endif
     return new DuckDBMVP(logger, runtime, bundles.mvp.mainModule);
 }