diff --git a/lib/web_ui/dev/felt b/lib/web_ui/dev/felt
index 06990731055..2a9e378028b 100755
--- a/lib/web_ui/dev/felt
+++ b/lib/web_ui/dev/felt
@@ -16,13 +16,13 @@ then
 fi
 GCLIENT_PATH=`which gclient`
 
-if [ -z "`which ninja`" ]
+if [ -z "`which autoninja`" ]
 then
-  echo "ERROR: ninja is not in your PATH"
+  echo "ERROR: autoninja is not in your PATH"
   echo "Fix: add the path to your installation of depot_tools to your PATH"
   exit 1
 fi
-NINJA_PATH=`which ninja`
+NINJA_PATH=`which autoninja`
 
 ENGINE_SRC_DIR="$(dirname $(dirname $(dirname $(dirname ${FELT_DIR}))))"
 FLUTTER_DIR="${ENGINE_SRC_DIR}/flutter"
@@ -45,7 +45,7 @@ then
   echo "Compiling the Dart SDK."
   gclient sync
   $GN --unoptimized --full-dart-sdk
-  ninja -C $HOST_DEBUG_UNOPT_DIR -j 100
+  "$NINJA_PATH" -C "$HOST_DEBUG_UNOPT_DIR"
 fi
 
 install_deps() {