diff --git a/.github/workflows/external.yml b/.github/workflows/external.yml
index 0c46bfbb..124ef20f 100644
--- a/.github/workflows/external.yml
+++ b/.github/workflows/external.yml
@@ -75,7 +75,7 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get install -y xvfb
-        sudo apt remove --purge libc++1
+        sudo apt remove --purge libc++1 libc++1-18
 
     - name: Start Xvfb
       run: Xvfb :99 -screen 0 1024x768x24 &