diff --git a/llvm/utils/gn/secondary/llvm/utils/llvm-lit/BUILD.gn b/llvm/utils/gn/secondary/llvm/utils/llvm-lit/BUILD.gn
--- a/llvm/utils/gn/secondary/llvm/utils/llvm-lit/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/utils/llvm-lit/BUILD.gn
@@ -86,6 +86,7 @@
 
   values = [
     "LLVM_SOURCE_DIR=" + rebase_path("//llvm", dir),
+    "Python3_EXECUTABLE=$python_path",
     "BUILD_MODE=.",
     "LLVM_LIT_CONFIG_MAP=" + config_map,
   ]
diff --git a/llvm/utils/llvm-lit/llvm-lit.in b/llvm/utils/llvm-lit/llvm-lit.in
--- a/llvm/utils/llvm-lit/llvm-lit.in
+++ b/llvm/utils/llvm-lit/llvm-lit.in
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!@Python3_EXECUTABLE@
 # -*- coding: utf-8 -*-
 
 import os