diff --git a/integration/commits.ts b/integration/commits.ts
index bbccaa7..4a447b5 100644
--- a/integration/commits.ts
+++ b/integration/commits.ts
@@ -1,4 +1,4 @@
-import type { Repository } from "./repository.ts";
+import { getTags, type Repository } from "./repository.ts";
 import * as github from "./github.ts";
 import { equals, parse } from "@std/semver";
 
@@ -30,7 +30,7 @@ export async function compareCommits(
   //
   // Otherwise, fetch the commits from the Git hosting platform
   //
-  const tags = await _getTags(repo);
+  const tags = await getTags(repo);
   // Tags and versions not necessarily include the "v" prefix consistently
   const base = tags.find((it) => equals(parse(it), parse(from)));
   const head = tags.find((it) => equals(parse(it), parse(to)));
@@ -45,15 +45,6 @@ export async function compareCommits(
   return commits;
 }
 
-async function _getTags(repo: Repository): Promise<string[]> {
-  switch (repo.host) {
-    case "github":
-      return await github.getTags(repo);
-    default:
-      throw new Error(`Unsupported Git hosting platform: ${repo.host}`);
-  }
-}
-
 async function _compareCommits(
   repo: Repository,
   base: string,
diff --git a/integration/deno.json b/integration/deno.json
index d73e87b..7603569 100644
--- a/integration/deno.json
+++ b/integration/deno.json
@@ -1,6 +1,6 @@
 {
   "name": "@molt/integration",
-  "version": "0.19.4",
+  "version": "0.19.5",
   "exports": {
     ".": "./mod.ts",
     "./commits": "./commits.ts",
diff --git a/integration/packages.ts b/integration/packages.ts
index 6cff33e..38edc70 100644
--- a/integration/packages.ts
+++ b/integration/packages.ts
@@ -1,8 +1,9 @@
 import { match, placeholder as _ } from "@core/match";
 import type { DependencySpec } from "@molt/core/specs";
 import * as Spec from "@molt/core/specs";
-import type { Repository } from "./repository.ts";
+import { getTags, type Repository } from "./repository.ts";
 import * as github from "./github.ts";
+import { equals, parse as SemVer } from "@std/semver";
 
 /**
  * A known package registry.
@@ -136,14 +137,19 @@ export function fromDependency(
   return tryParse(Spec.stringify(dependency, "kind", "name"));
 }
 
-export function resolvePackageRoot(
+export async function resolvePackageRoot(
   repo: Repository,
   pkg: Package,
-  ref?: string,
+  version?: string,
 ): Promise<string | undefined> {
+  const tags = await getTags(repo);
+  const ref = version
+    ? tags.find((it) => equals(SemVer(it), SemVer(version)))
+    : undefined;
   switch (repo.host) {
-    case "github":
+    case "github": {
       return github.resolvePackageRoot(repo, pkg, ref);
+    }
     default:
       throw new Error(`Unsupported hosting platform: ${repo.host}`);
   }
diff --git a/integration/packages_test.ts b/integration/packages_test.ts
index d7835f4..289506c 100644
--- a/integration/packages_test.ts
+++ b/integration/packages_test.ts
@@ -4,9 +4,11 @@ import {
   is,
   type Package,
   parse,
+  resolvePackageRoot,
   stringify,
   tryParse,
 } from "./packages.ts";
+import type { Repository } from "./repository.ts";
 
 Deno.test("parse", () => {
   assertEquals(
@@ -92,3 +94,19 @@ Deno.test("fromDependency - deno.land", () => {
   });
   assertEquals(result, undefined);
 });
+
+Deno.test("resolvePackageRoot - @core/unknownutil", async () => {
+  const repo: Repository = {
+    host: "github",
+    owner: "jsr-core",
+    name: "unknownutil",
+  };
+  assertEquals(
+    await resolvePackageRoot(
+      repo,
+      parse("jsr:@core/unknownutil"),
+      "4.0.0",
+    ),
+    ".",
+  );
+});
diff --git a/integration/repository.ts b/integration/repository.ts
index 06d7cf1..7fb9a4e 100644
--- a/integration/repository.ts
+++ b/integration/repository.ts
@@ -1,5 +1,6 @@
 import { ensure, is } from "@core/unknownutil";
 import { type Package, stringify } from "./packages.ts";
+import * as github from "./github.ts";
 
 /**
  * A git repository on a hosting platform.
@@ -14,6 +15,15 @@ export interface Repository<
 
 export type KnownGitHostingPlatform = "github";
 
+export async function getTags(repo: Repository): Promise<string[]> {
+  switch (repo.host) {
+    case "github":
+      return await github.getTags(repo);
+    default:
+      throw new Error(`Unsupported Git hosting platform: ${repo.host}`);
+  }
+}
+
 /**
  * Resolve the repository of the given package
  */