diff --git a/.github/workflows/builds.yml b/.github/workflows/builds.yml
index e2a42a92f7..c784a48103 100644
--- a/.github/workflows/builds.yml
+++ b/.github/workflows/builds.yml
@@ -1011,6 +1011,7 @@ jobs:
                 libjansson-dev \
                 libpython2.7 \
                 make \
+                mscgen \
                 parallel \
                 python3-yaml \
                 rustc \