diff --git a/index.js b/index.js
index 7154ed6..7a9f64b 100644
--- a/index.js
+++ b/index.js
@@ -17,18 +17,13 @@ async function run() {
       core.setFailed('environment variable RUNNER_TEMP is undefined');
       return;
     }
-    const dest = path.join(tmp_dir, 'msys');
-
-    await io.mkdirP(dest);
 
     const distrib = await tc.downloadTool('http://repo.msys2.org/distrib/x86_64/msys2-base-x86_64-20190524.tar.xz');
 
-    await exec.exec(`tar`, [
-      '-x', '-J', '--force-local',
-      // For some reason, GNU Tar on Windows expects paths to be slash-separated
-      '-C', dest.replace(/\\/g, '/'),
-      '-f', distrib
-    ]);
+    const dest = path.join(tmp_dir, 'msys');
+    await io.mkdirP(dest);
+
+    await tc.extractTar(distrib, dest);
 
     let cmd = path.join(dest, 'msys2do.cmd');
     fs.writeFileSync(cmd, [