diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2676754bfa..4094bbb168 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -208,6 +208,7 @@ jobs:
           dylibbundler \
           pkg-config \
           ninja
+        python3 -m pip install pyyaml
     - name: Initialize compiler, library cache
       id: cache
       uses: actions/cache@v2.1.6