diff --git a/third_party/.gitignore b/third_party/.gitignore
index 45ae89eb3d05d..5bd42c1696fca 100644
--- a/third_party/.gitignore
+++ b/third_party/.gitignore
@@ -1,6 +1,6 @@
 # Ignore everything by default, as these come from gclient/DEPS.
 # We'll explicitly include the folders we want to track.
-*
+/*
 
 # Include the .gitignore file itself and .clang-tidy.
 !.gitignore
@@ -13,7 +13,6 @@
 # Include folders that have hand-written code (not DEPS).
 !accessibility/
 !canvaskit/
-!ninja/
 !spring_animation/
 !test_shaders/
 !tonic/