diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index 3863f2d..2e3fc3d 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -85,7 +85,7 @@ jobs:
           - name: "Ubuntu 18.04 Clang 9.0"
             os: ubuntu-18.04
             build_type: Release
-            packages: ninja-build
+            packages: ninja-build libc++-9-dev libc++abi-9-dev
             generator: Ninja
             compatibility: "cxx_std_11;cxx_std_17;cxx_std_20"
             cc: clang