diff --git a/loaih/build.py b/loaih/build.py
index 0c619d5..0a74e58 100644
--- a/loaih/build.py
+++ b/loaih/build.py
@@ -10,6 +10,7 @@ import re
 import shlex
 import tempfile
 import urllib.request
+import hashlib
 from lxml import etree
 import loaih
 
@@ -424,13 +425,22 @@ class Build(loaih.RemoteBuild):
     def __create_checksum__(self, file):
         """Internal function to create checksum file."""
 
+        retval = hashlib.md5()
+        with open(file, 'rb') as rawfile:
+            while True:
+                buf = rawfile.read(2**20)
+                if not buf:
+                    break
+
+                retval.update(buf)
+
         checksum = subprocess.run(f"md5sum {file}", shell=True,
             capture_output=True, text=True, encoding='utf-8', check=True,
             cwd=self.appnamedir)
 
         if checksum.stdout:
             with open(f"{file}.md5", 'w', encoding='utf-8') as checkfile:
-                checkfile.write(checksum.stdout)
+                checkfile.write(f"{retval.hexdigest()}  {os.path.basename(file)}")
 
 
     def publish(self):