diff --git a/tools_webrtc/android/build_aar.py b/tools_webrtc/android/build_aar.py
index 42a902cafd..d910b39a7c 100755
--- a/tools_webrtc/android/build_aar.py
+++ b/tools_webrtc/android/build_aar.py
@@ -121,7 +121,7 @@ def _RunGN(args):
 
 def _RunNinja(output_directory, args):
   cmd = [
-      os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'ninja'), '-C',
+      os.path.join(SRC_DIR, 'third_party', 'ninja', 'ninja'), '-C',
       output_directory
   ]
   cmd.extend(args)
diff --git a/tools_webrtc/ios/build_ios_libs.py b/tools_webrtc/ios/build_ios_libs.py
index 093a002d76..764c378c7b 100755
--- a/tools_webrtc/ios/build_ios_libs.py
+++ b/tools_webrtc/ios/build_ios_libs.py
@@ -197,7 +197,7 @@ def BuildWebRTC(output_dir, target_environment, target_arch, flavor,
   logging.info('Building target: %s', gn_target_name)
 
   cmd = [
-      os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'ninja'),
+      os.path.join(SRC_DIR, 'third_party', 'ninja', 'ninja'),
       '-C',
       output_dir,
       gn_target_name,
diff --git a/tools_webrtc/presubmit_checks_lib/build_helpers.py b/tools_webrtc/presubmit_checks_lib/build_helpers.py
index 86fc1a0bbd..3386d6d40c 100644
--- a/tools_webrtc/presubmit_checks_lib/build_helpers.py
+++ b/tools_webrtc/presubmit_checks_lib/build_helpers.py
@@ -69,7 +69,7 @@ def RunGnCheck(root_dir=None):
 def RunNinjaCommand(args, root_dir=None):
   """Runs ninja quietly. Any failure (e.g. clang not found) is
      silently discarded, since this is unlikely an error in submitted CL."""
-  command = [os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'ninja')] + args
+  command = [os.path.join(SRC_DIR, 'third_party', 'ninja', 'ninja')] + args
   p = subprocess.Popen(command,
                        cwd=root_dir,
                        stdout=subprocess.PIPE,