diff --git a/amalgamate.py b/amalgamate.py
index 04371316..fddd168c 100644
--- a/amalgamate.py
+++ b/amalgamate.py
@@ -5,7 +5,8 @@ import sys
 import time
 from typing import List, Dict
 
-assert os.system("python prebuild.py") == 0
+if os.system("python prebuild.py") != 0:
+    assert os.system("python3 prebuild.py") == 0
 
 ROOT = 'include/pocketpy'
 PUBLIC_HEADERS = ['config.h', 'export.h', 'linalg.h', 'pocketpy.h']
@@ -156,4 +157,4 @@ if sys.platform in ['linux', 'darwin']:
 print("amalgamated/pocketpy.h")
 
 shutil.copy("amalgamated/pocketpy.h", "plugins/flutter/pocketpy/src/pocketpy.h")
-shutil.copy("amalgamated/pocketpy.c", "plugins/flutter/pocketpy/src/pocketpy.c")
\ No newline at end of file
+shutil.copy("amalgamated/pocketpy.c", "plugins/flutter/pocketpy/src/pocketpy.c")