diff --git a/Package.swift b/Package.swift
index 6f9aecd9..6d78be36 100644
--- a/Package.swift
+++ b/Package.swift
@@ -59,6 +59,11 @@ let package = Package(
             name: "FileSystem",
             targets: ["FileSystem"]
         ),
+        // This support library should be moved to JavaScriptKit
+        .library(
+            name: "ECMAScript",
+            targets: ["ECMAScript"]
+        ),
         .executable(name: "WebIDLToSwift", targets: ["WebIDLToSwift"]),
     ],
     dependencies: [
diff --git a/Sources/WebIDLToSwift/PackageManifest.swift b/Sources/WebIDLToSwift/PackageManifest.swift
index c8b8ed2d..218b865e 100644
--- a/Sources/WebIDLToSwift/PackageManifest.swift
+++ b/Sources/WebIDLToSwift/PackageManifest.swift
@@ -24,6 +24,11 @@ func generateManifest(_ modules: [Module]) -> String {
             """#
         }.joined(separator: "\n")
     )
+            // This support library should be moved to JavaScriptKit
+            .library(
+                name: "ECMAScript",
+                targets: ["ECMAScript"]
+            ),
             .executable(name: "WebIDLToSwift", targets: ["WebIDLToSwift"]),
         ],
         dependencies: [