diff --git a/README.md b/README.md
index 39c9c81..68d891e 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,8 @@ Please make each contribution reasonably small. If you would like to make a big
 It is recommended to install 16GB RAM in your build system.
 
 ### Build System
-CMake 3.13.4 or newer is required. [Download](https://cmake.org/download/) and install proper one if the cmake is older than 3.13.4.
+* CMake 3.13.4 or newer is required. [Download](https://cmake.org/download/) and install proper one if the cmake is older than 3.13.4.
+* Ninja is requred.
 
 ### Install Dev and Tools Packages
 #### Ubuntu
@@ -143,18 +144,17 @@ repo sync
 ```
 cd <vulkandriver_path>/drivers/xgl
 
-cmake -H. -Bbuilds/Release64
+cmake -H. -G Ninja -Bbuilds/Release64
 
 cd builds/Release64
 
-make -j$(nproc)
+ninja
 ```
 > **Note:**
 * For RedHat 7.x, please use cmake3(>= 3.13.4) instead of cmake.
-* For debug build, use `-DCMAKE_BUILD_TYPE=Debug`.
+* For debug build, use `-DCMAKE_BUILD_TYPE=Debug -DLLVM_PARALLEL_LINK_JOBS=2` (Linking a debug build of llvm is very memory intensive, so we use only two parallel jobs).
 * For 32-bit build, use `-DCMAKE_C_FLAGS=-m32 -DCMAKE_CXX_FLAGS=-m32`.
 * To enable Wayland support, use `-DBUILD_WAYLAND_SUPPORT=ON`.
-* If the build runs into errors like "collect2: fatal error: ld terminated with signal 9 [Killed]" due to out of memory, you could try  with reducing the number of threads in "make" command.
 
 ## Installation Instructions
 ### Install Vulkan SDK