diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 6057441cd..1f3c57b8f 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -8,7 +8,8 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    # Avoiding -latest due to https://github.com/actions/setup-python/issues/162
+    runs-on: ubuntu-20.04
     timeout-minutes: 10
     strategy:
       matrix: