diff -pruN mozc.orig/build_mozc.py mozc/build_mozc.py
--- mozc.orig/build_mozc.py	2017-02-06 11:22:05.000000000 +0900
+++ mozc/build_mozc.py	2017-02-06 14:50:59.124605000 +0900
@@ -802,7 +802,7 @@ def GypMain(options, unused_args):
 
 def GetNinjaPath():
   """Returns the path to Ninja."""
-  ninja = 'ninja'
+  ninja = 'ninja-build'
   if IsWindows():
     ninja = 'ninja.exe'
   return ninja