diff --git a/package-lock.json b/package-lock.json
index b1e676f..a87e53f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@open-audio-stack/core",
-  "version": "0.1.48",
+  "version": "0.1.49",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@open-audio-stack/core",
-      "version": "0.1.48",
+      "version": "0.1.49",
       "license": "cc0-1.0",
       "dependencies": {
         "@vscode/sudo-prompt": "^9.3.1",
diff --git a/package.json b/package.json
index 7386922..989f935 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@open-audio-stack/core",
-  "version": "0.1.48",
+  "version": "0.1.49",
   "description": "Open-source audio plugin management software",
   "type": "module",
   "main": "./build/index.js",
diff --git a/src/classes/Manager.ts b/src/classes/Manager.ts
index 98907f3..bead600 100644
--- a/src/classes/Manager.ts
+++ b/src/classes/Manager.ts
@@ -6,7 +6,7 @@ import { ManagerReport, PackageVersion } from '../types/Package.js';
 import { RegistryInterface, RegistryPackages, RegistryType } from '../types/Registry.js';
 import { Base } from './Base.js';
 import { packageCompatibleFiles } from '../helpers/package.js';
-import { getArchitecture, getSystem } from '../helpers/utilsLocal.js';
+import { Architecture, SystemType } from '../index-browser.js';
 
 export class Manager extends Base {
   protected config: Config;
@@ -64,7 +64,7 @@ export class Manager extends Base {
     }
   }
 
-  listPackages(installed?: boolean, showAll = false) {
+  listPackages(installed?: boolean, architecture?: Architecture, system?: SystemType) {
     let packages = Array.from(this.packages.values());
 
     if (installed !== undefined) {
@@ -75,11 +75,13 @@ export class Manager extends Base {
       );
     }
 
-    if (!showAll) {
+    if (architecture || system) {
       packages = packages.filter(pkg => {
         const pkgVersion = pkg.getVersionLatest();
         if (!pkgVersion) return false;
-        const files = packageCompatibleFiles(pkgVersion, [getArchitecture()], [getSystem()], []);
+        const archArr = architecture ? [architecture] : [];
+        const sysArr = system ? [system] : [];
+        const files = packageCompatibleFiles(pkgVersion, archArr, sysArr, []);
         return files.length > 0;
       });
     }
diff --git a/tests/classes/Manager.test.ts b/tests/classes/Manager.test.ts
index 2bd384c..9c6f078 100644
--- a/tests/classes/Manager.test.ts
+++ b/tests/classes/Manager.test.ts
@@ -1,5 +1,12 @@
 import { expect, test } from 'vitest';
-import { PLUGIN, PLUGIN_PACKAGE, PLUGIN_PACKAGE_EMPTY, PLUGIN_PACKAGE_MULTIPLE } from '../data/Plugin';
+import {
+  PLUGIN,
+  PLUGIN_INCOMPATIBLE,
+  PLUGIN_PACKAGE,
+  PLUGIN_PACKAGE_EMPTY,
+  PLUGIN_PACKAGE_INCOMPATIBLE,
+  PLUGIN_PACKAGE_MULTIPLE,
+} from '../data/Plugin';
 import { Manager } from '../../src/classes/Manager';
 import { RegistryType } from '../../src/types/Registry';
 import { Package } from '../../src/classes/Package';
@@ -110,6 +117,15 @@ test('Manager list packages', () => {
   expect(manager.listPackages(false)).toEqual([pkg]);
 });
 
+test('Manager list packages incompatible', () => {
+  const manager = new Manager(RegistryType.Plugins);
+  const pkgNoWin = new Package(PLUGIN_PACKAGE_INCOMPATIBLE.slug);
+  pkgNoWin.addVersion(PLUGIN_PACKAGE_INCOMPATIBLE.version, PLUGIN_INCOMPATIBLE);
+  manager.addPackage(pkgNoWin);
+  expect(manager.listPackages(undefined, Architecture.X64, SystemType.Win)).toEqual([]);
+  expect(manager.listPackages(undefined, Architecture.X64, SystemType.Linux)).toEqual([pkgNoWin]);
+});
+
 test('Manager filter packages', () => {
   const manager = new Manager(RegistryType.Plugins);
   const pkg = new Package(PLUGIN_PACKAGE.slug);
diff --git a/tests/data/Plugin.ts b/tests/data/Plugin.ts
index 5479a6b..6f96741 100644
--- a/tests/data/Plugin.ts
+++ b/tests/data/Plugin.ts
@@ -91,6 +91,10 @@ export const PLUGIN: PluginInterface = {
 export const PLUGIN_INSTALLED: PluginInterface = structuredClone(PLUGIN);
 PLUGIN_INSTALLED.installed = true;
 
+export const PLUGIN_INCOMPATIBLE: PluginInterface = structuredClone(PLUGIN);
+// Remove the Windows-compatible file entry so this package is incompatible with Win.
+PLUGIN_INCOMPATIBLE.files.splice(4, 1);
+
 export const PLUGIN_PACKAGE: PackageInterface = {
   slug,
   version,
@@ -121,3 +125,11 @@ export const PLUGIN_PACKAGE_MULTIPLE: PackageInterface = {
     '1.3.2': PLUGIN,
   },
 };
+
+export const PLUGIN_PACKAGE_INCOMPATIBLE: PackageInterface = {
+  slug,
+  version,
+  versions: {
+    [version]: PLUGIN_INCOMPATIBLE,
+  },
+};