diff --git a/.github/workflows/flowzone.yml b/.github/workflows/flowzone.yml
index 79f1bd5..34485d4 100644
--- a/.github/workflows/flowzone.yml
+++ b/.github/workflows/flowzone.yml
@@ -26,3 +26,10 @@ jobs:
       repo_config: true
       repo_description: "sshproxy is a simple ssh server library exposing an even simpler API"
       docker_images: ""
+      # open-balena-base/GLIBC compatibility
+      custom_runs_on: |
+        [["ubuntu-20.04"]]
+      docker_runs_on: |
+        {
+          "linux/amd64": ["ubuntu-20.04"]
+        }