diff --git a/config.json b/config.json
index 593915097..afb6ccdac 100644
--- a/config.json
+++ b/config.json
@@ -2,6 +2,10 @@
   "definitions": {
     "npm": {
       "default": "8.13.1",
+      "fetchLatestFrom": {
+        "type": "npm",
+        "package": "npm"
+      },
       "transparent": {
         "commands": [
           [
@@ -29,6 +33,10 @@
     },
     "pnpm": {
       "default": "7.3.0",
+      "fetchLatestFrom": {
+        "type": "npm",
+        "package": "pnpm"
+      },
       "transparent": {
         "commands": [
           [
@@ -71,6 +79,10 @@
     },
     "yarn": {
       "default": "1.22.19",
+      "fetchLatestFrom": {
+        "type": "npm",
+        "package": "yarn"
+      },
       "transparent": {
         "default": "3.2.1",
         "commands": [
diff --git a/sources/Engine.ts b/sources/Engine.ts
index f98c049e2..1ce9a1576 100644
--- a/sources/Engine.ts
+++ b/sources/Engine.ts
@@ -7,7 +7,6 @@ import defaultConfig                                          from '../config.js
 
 import * as corepackUtils                                     from './corepackUtils';
 import * as folderUtils                                       from './folderUtils';
-import {fetchAsJson}                                          from './httpUtils';
 import * as semverUtils                                       from './semverUtils';
 import {Config, Descriptor, Locator}                          from './types';
 import {SupportedPackageManagers, SupportedPackageManagerSet} from './types';
@@ -81,8 +80,7 @@ export class Engine {
     if (process.env.COREPACK_NO_LOOKUP)
       return definition.default;
 
-    const {[`dist-tags`]: {latest}, versions: {[latest]: {dist: {shasum}}}} = await fetchAsJson(`https://registry.npmjs.org/${packageManager}`);
-    const reference = `${latest}+sha1.${shasum}`;
+    const reference = await corepackUtils.fetchLatestStableVersion(definition.fetchLatestFrom);
 
     await this.activatePackageManager({
       name: packageManager,
diff --git a/sources/corepackUtils.ts b/sources/corepackUtils.ts
index acd74e575..09c31ec93 100644
--- a/sources/corepackUtils.ts
+++ b/sources/corepackUtils.ts
@@ -9,6 +9,23 @@ import * as httpUtils                                          from './httpUtils
 import * as nodeUtils                                          from './nodeUtils';
 import {RegistrySpec, Descriptor, Locator, PackageManagerSpec} from './types';
 
+export async function fetchLatestStableVersion(spec: RegistrySpec) {
+  switch (spec.type) {
+    case `npm`: {
+      const {[`dist-tags`]: {latest}, versions: {[latest]: {dist: {shasum}}}} =
+        await httpUtils.fetchAsJson(`https://registry.npmjs.org/${spec.package}`);
+      return `${latest}+sha1.${shasum}`;
+    }
+    case `url`: {
+      const data = await httpUtils.fetchAsJson(spec.url);
+      return data[spec.fields.tags].stable;
+    }
+    default: {
+      throw new Error(`Unsupported specification ${JSON.stringify(spec)}`);
+    }
+  }
+}
+
 export async function fetchAvailableTags(spec: RegistrySpec): Promise<Record<string, string>> {
   switch (spec.type) {
     case `npm`: {
diff --git a/sources/types.ts b/sources/types.ts
index 8f19f294c..8ed2cfd19 100644
--- a/sources/types.ts
+++ b/sources/types.ts
@@ -62,6 +62,11 @@ export interface Config {
        */
       default: string;
 
+      /**
+       * Defines how to fetch the latest version from a remote registry.
+       */
+      fetchLatestFrom: RegistrySpec;
+
       /**
        * Defines a set of commands that are fine to run even if the user isn't
        * in a project configured for the specified package manager. For instance,