diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 08840da29..0b7500156 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -18,11 +18,12 @@ build:
   os: ubuntu-22.04
   apt_packages:
   - cmake
+  - ninja
   tools:
     python: '3.10'
   jobs:
     post_install:
-    - cmake -B build -S . -DVTKm_ENABLE_DOCUMENTATION=ON -DVTKm_ENABLE_USERS_GUIDE=ON
+    - cmake -GNinja -B build -S . -DVTKm_ENABLE_DOCUMENTATION=ON -DVTKm_ENABLE_USERS_GUIDE=ON
     - cmake --build build --target docs/doxygen
 
 sphinx: