diff --git a/Telegram/build/prepare/prepare.py b/Telegram/build/prepare/prepare.py
index 4997ba7cd0..45e64be63f 100644
--- a/Telegram/build/prepare/prepare.py
+++ b/Telegram/build/prepare/prepare.py
@@ -1579,7 +1579,10 @@ win:
         -nomake tests ^
         -platform win32-msvc
 
-    jom -j%NUMBER_OF_PROCESSORS%
+    rem jom -jN occasionally fails to create the shared mkspecs\modules-inst
+    rem directory due to a race in qmake's mkpath under parallel builds; the
+    rem build is incremental, so simply retrying picks up where it stopped.
+    jom -j%NUMBER_OF_PROCESSORS% || jom -j%NUMBER_OF_PROCESSORS%
     jom -j%NUMBER_OF_PROCESSORS% install
 """)
 else: # qt > '6'