diff --git a/src/docker/install.ts b/src/docker/install.ts
index f3008cb4..e1450452 100644
--- a/src/docker/install.ts
+++ b/src/docker/install.ts
@@ -200,8 +200,12 @@ export class Install {
     await io.mkdirP(limaDir);
     const dockerHost = `unix://${limaDir}/docker.sock`;
 
+    // this.toolDir is a very long path which causes trouble when mounting it in lima.
+    // Copy it to a shorter path.
+    const limaToolsDir = path.join(limaDir, 'tools');
+
     await core.group('Listing toolDir', async () => {
-      await Exec.exec('ls', ['-la', this.toolDir]);
+      await Exec.exec('cp', ['-r', this.toolDir, limaToolsDir]);
     });
 
     // avoid brew to auto update and upgrade unrelated packages.
@@ -239,7 +243,7 @@ export class Install {
         srcArchiveVersion: srcArchive.version?.replace(/^v/, ''),
         srcArchiveChannel: srcArchive.channel,
         srcImageTag: (src as InstallSourceImage).tag,
-        toolDir: this.toolDir
+        toolDir: limaToolsDir,
       });
       core.info(`Writing lima config to ${path.join(limaDir, 'lima.yaml')}`);
       fs.writeFileSync(path.join(limaDir, 'lima.yaml'), limaCfg);
diff --git a/src/undock.ts b/src/undock.ts
new file mode 100644
index 00000000..81c3c8d2
--- /dev/null
+++ b/src/undock.ts
@@ -0,0 +1,70 @@
+/**
+ * Copyright 2023 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import os from 'os';
+import * as core from '@actions/core';
+import * as tc from '@actions/tool-cache';
+
+export class Undock {
+  static _toolDir: string;
+
+  static async install(): Promise<void> {
+    core.info('Installing undock...');
+
+    const version = '0.8.0';
+    const url = this.undockUrl(version);
+
+    const archivePath = await tc.downloadTool(url);
+    const extractedPath = await tc.extractTar(archivePath);
+
+    const undockPath = extractedPath + `undock_${version}_${this.platformArch()}/undock`;
+    const toolDir = await tc.cacheDir(undockPath, 'undock', version);
+
+    core.debug(`undock dir: ${toolDir}`);
+    core.addPath(toolDir);
+    this._toolDir = toolDir;
+  }
+
+  private static undockUrl(version): string {
+    const pa = this.platformArch();
+    const extension = os.platform() === 'win32' ? 'zip' : 'tar.gz';
+    return `https://github.com/crazy-max/undock/releases/download/v${version}/undock_${version}_${pa}.${extension}`;
+  }
+
+  private static platformArch(): string {
+    const platform = os.platform() === 'win32' ? 'windows' : os.platform();
+
+    let arch = os.arch();
+    switch (arch) {
+      case 'x64': {
+        arch = 'amd64';
+        break;
+      }
+      case 'ppc64': {
+        arch = 'ppc64le';
+        break;
+      }
+      case 'arm': {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const arm_version = (process.config.variables as any).arm_version;
+        arch = arm_version ? 'armv' + arm_version : 'arm';
+        break;
+      }
+    }
+
+    return `${platform}_${arch}`;
+  }
+}