npm install + git add -a

node_modules/bufferutil/binding.gyp

@@ -0,0 +1,32 @@
+{
+  'variables': {
+    'openssl_fips': ''
+  },
+  'targets': [
+    {
+      'target_name': 'bufferutil',
+      'sources': ['src/bufferutil.c'],
+      'cflags': ['-std=c99'],
+      'conditions': [
+        ["OS=='mac'", {
+          'variables': {
+            'clang_version':
+              '<!(cc -v 2>&1 | perl -ne \'print $1 if /clang version ([0-9]+(\\.[0-9]+){2,})/\')'
+          },
+          'xcode_settings': {
+            'MACOSX_DEPLOYMENT_TARGET': '10.7'
+          },
+          'conditions': [
+            # Use Perl v-strings to compare versions.
+            ['clang_version and <!(perl -e \'print <(clang_version) cmp 12.0.0\')==1', {
+              'xcode_settings': {
+                'OTHER_CFLAGS': ['-arch arm64'],
+                'OTHER_LDFLAGS': ['-arch arm64']
+              }
+            }]
+          ]
+        }]
+      ]
+    }
+  ]
+}