diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 803e51e5..71c8c295 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -53,11 +53,15 @@ jobs:
           - os: ubuntu-24.04
             compiler: flang
             version: latest
-            container: snowstep/llvm:noble
+            # pinned to old build due to https://github.com/kei-g/docker-llvm/issues/78
+            #container: snowstep/llvm:ubuntu-24.04-latest
+            container: snowstep/llvm:ubuntu-24.04-20260517082025
           - os: ubuntu-22.04
             compiler: flang
             version: latest
-            container: snowstep/llvm:jammy
+            # pinned to old build due to https://github.com/kei-g/docker-llvm/issues/78
+            #container: snowstep/llvm:ubuntu-22.04-latest
+            container: snowstep/llvm:ubuntu-22.04-20260528071927
 
           # https://hub.docker.com/r/phhargrove/llvm-flang/tags
           - os: ubuntu-24.04