diff -Nur a/src/gn/exec_process_unittest.cc b/src/gn/exec_process_unittest.cc
--- a/src/gn/exec_process_unittest.cc	2022-11-25 10:58:41.000000000 +0800
+++ b/src/gn/exec_process_unittest.cc	2022-11-26 14:55:45.715627292 +0800
@@ -33,7 +33,7 @@
   args.push_back(L"-c");
   args.push_back(base::UTF8ToUTF16(command));
 #else
-  args.push_back("python");
+  args.push_back("python3");
   args.push_back("-c");
   args.push_back(command);
 #endif