diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b195a4d..b7974c9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,6 +44,8 @@ jobs:
 
       - name: Install system dependencies
         run: |
+          echo 'Acquire::http::Proxy "http://172.17.0.1:7897";' | sudo tee /etc/apt/apt.conf.d/99proxy
+          echo 'Acquire::https::Proxy "http://172.17.0.1:7897";' | sudo tee -a /etc/apt/apt.conf.d/99proxy
           APT_OPTS=(-o Acquire::Retries=5 -o Acquire::http::Timeout=30 -o Acquire::https::Timeout=30)
           sudo apt-get "${APT_OPTS[@]}" update --error-on=any
           # NOTE: do NOT use --no-install-recommends for libclang-dev — on