diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index 33a4afc7..9b5b8bdb 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -41,8 +41,10 @@ jobs:
           execute_process(COMMAND sudo apt-get install fontconfig)
           execute_process(COMMAND sudo apt-get install libgtkglext1-dev)
           execute_process(COMMAND sudo apt-get install libgtk-3-devv)
+          execute_process(COMMAND sudo apt-get install ninja-build)
         elseif ("${{ runner.os }}" STREQUAL "macOS")
           execute_process(COMMAND brew install fontconfig)
+          execute_process(COMMAND brew install ninja)
         endif()
     - name: Configure
       shell: cmake -P {0}