diff --git a/index.js b/index.js
index 4c9b569..1d45918 100644
--- a/index.js
+++ b/index.js
@@ -1,57 +1,31 @@
-const os = require('os');
-const fs = require('fs');
-const path = require('path');
+const child_process = require('child_process');
 const crypto = require('crypto');
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
 
+const cache = require('@actions/cache');
 const core = require('@actions/core');
 const exec = require('@actions/exec');
 const github = require('@actions/github');
 const tr = require('@actions/exec/lib/toolrunner');
-const cache = require('@actions/cache');
-
-const paths = [path.join(os.homedir(), '.cache', 'pre-commit')];
-
-async function getPythonVersion() {
-    let myOutput = '';
-    const options = {
-        silent: true,
-        listeners: {
-            stdout: (data) => {
-                myOutput += data.toString();
-            }
-        }
-    };
-
-    await exec.exec('python', ['-VV'], options);
-    await exec.exec('which', ['python'], options);
-    return myOutput;
-}
-
-function hashFile(filePath) {
-    return hashString(fs.readFileSync(filePath).toString());
-
-}
 
 function hashString(content) {
     const sha256 = crypto.createHash('sha256');
     return sha256.update(content).digest('hex');
 }
 
-async function setupCache(cacheKey) {
-    try {
-        await cache.saveCache(paths, cacheKey);
-    } catch (e) {
-        if (e.toString().includes('reserveCache failed')) {
-            // race condition
-            core.info(e.message);
-            return;
-        }
-        throw e;
+function getPythonVersion() {
+    const args = ['-c', 'import sys;print(sys.executable+"\\n"+sys.version)'];
+    const res = child_process.spawnSync('python', args);
+    if (res.status !== 0) {
+        throw 'python version check failed';
     }
+    return res.stdout.toString();
 }
 
-async function restoreCache(cacheKey) {
-    return !!(await cache.restoreCache(paths, cacheKey));
+function hashFile(filePath) {
+    return hashString(fs.readFileSync(filePath).toString());
 }
 
 function addToken(url, token) {
@@ -74,11 +48,12 @@ async function main() {
     const pr = github.context.payload.pull_request;
     const push = !!token && !!pr;
 
-    const pyVer = await getPythonVersion();
-    const cacheKey = `pre-commit-1-${hashString(pyVer)}-${hashFile('.pre-commit-config.yaml')}`;
-    await restoreCache(cacheKey);
+    const cachePaths = [path.join(os.homedir(), '.cache', 'pre-commit')];
+    const py = getPythonVersion();
+    const cacheKey = `pre-commit-2-${hashString(py)}-${hashFile('.pre-commit-config.yaml')}`;
+    await cache.restoreCache(cachePaths, cacheKey);
     const ret = await exec.exec('pre-commit', args, {ignoreReturnCode: push});
-    await setupCache(cacheKey);
+    await cache.saveCache(cachePaths, cacheKey);
 
     if (ret && push) {
         // actions do not run on pushes made by actions.