diff --git a/.npm/bin/index.js b/.npm/bin/index.js
index 2ada9ce7..2e64e83e 100755
--- a/.npm/bin/index.js
+++ b/.npm/bin/index.js
@@ -1,14 +1,14 @@
 #!/usr/bin/env node
 
 var spawn = require('child_process').spawn;
-var path = require('path');
+const { getExePath } = require('../get-exe');
 
 var command_args = process.argv.slice(2);
 
 var child = spawn(
-    path.join(__dirname, 'lefthook'),
+    getExePath(),
     command_args,
-    { stdio: [process.stdin, process.stdout, process.stderr] });
+    { stdio: "inherit" });
 
 child.on('close', function (code) {
     if (code !== 0) {
diff --git a/.npm/bin/lefthook b/.npm/bin/lefthook
deleted file mode 100755
index 278e5494..00000000
--- a/.npm/bin/lefthook
+++ /dev/null
@@ -1,51 +0,0 @@
-#!/bin/sh
-
-dir="$(cd "$(dirname "$0")" >/dev/null 2>&1 || exit ; pwd -P)"
-
-OS=$(uname -s)
-ARCH=$(uname -m)
-EXT=
-
-# Detect OS
-case $OS in
-    Linux)
-        GOOS=linux
-        ;;
-    Darwin)
-        GOOS=darwin
-        ;;
-    Windows*|CYGWIN*|MSYS_NT*|MINGW*)
-        GOOS=windows
-        EXT=.exe
-        ;;
-    *)
-        echo "Unsupported OS: ${OS}"
-        exit 1
-        ;;
-esac
-
-# Detect architecture
-case $ARCH in
-    x86_64)
-        GOARCH=amd64
-        ;;
-    x86)
-        GOARCH=386
-        ;;
-    arm64)
-        GOOS=arm64
-        ;;
-    *)
-        echo "Unsupported CPU architecture: ${ARCH}"
-        exit 1
-        ;;
-esac
-
-executable="$dir/lefthook_${GOOS}_${GOARCH}/lefthook${EXT}"
-
-if [ -x "$executable" ]; then
-    exec "$executable" "$@"
-else
-    echo "Lefthook wasn't build for ${OS} ${ARCH}"
-    exit 1
-fi
diff --git a/.npm/get-exe.js b/.npm/get-exe.js
new file mode 100644
index 00000000..217578ba
--- /dev/null
+++ b/.npm/get-exe.js
@@ -0,0 +1,36 @@
+const path = require("path")
+
+function getExePath() {
+  // Detect OS
+  // https://nodejs.org/api/process.html#process_process_platform
+  let goOS = process.platform;
+  let extension = '';
+  if (['win32', 'cygwin'].includes(process.platform)) {
+    goOS = 'windows';
+    extension = '.exe';
+  }
+
+  // Detect architecture
+  // https://nodejs.org/api/process.html#process_process_arch
+  let goArch = process.arch;
+  switch (process.arch) {
+    case 'x64': {
+      goArch = 'amd64';
+      break;
+    }
+    case 'x32':
+    case 'ia32': {
+      goArch = '386';
+      break;
+    }
+  }
+
+  const dir = path.join(__dirname, 'bin');
+  const executable = path.join(
+    dir,
+    `lefthook_${goOS}_${goArch}`,
+    `lefthook${extension}`
+  );
+  return executable;
+}
+exports.getExePath = getExePath;
diff --git a/.npm/postinstall.js b/.npm/postinstall.js
index 93fb2fd1..68708d9d 100755
--- a/.npm/postinstall.js
+++ b/.npm/postinstall.js
@@ -1,13 +1,10 @@
-const { spawn } = require("child_process");
-const { join } = require("path");
+if (!process.env.CI) {
+  const { spawnSync } = require('child_process');
+  const { getExePath } = require('./get-exe');
 
-const isCI = process.env.CI;
-
-if (!isCI) {
-  binpath = join(__dirname, 'bin', 'lefthook');
-
-  result = spawn(binpath, ["install", "-f"], {
-      cwd: process.env.INIT_CWD,
-      stdio: [process.stdin, process.stdout, process.stderr]
+  // run install
+  spawnSync(getExePath(), ['install', '-f'], {
+    cwd: process.env.INIT_CWD || process.cwd,
+    stdio: 'inherit',
   });
 }