diff --git a/.github/workflows/test-spack.yml b/.github/workflows/test-spack.yml
index 0b44f5f3f95fb6a6a8a4dd19ba15e8c346e6e927..23439c7bc4e541e343d5eb40889461d8153c8958 100644
--- a/.github/workflows/test-spack.yml
+++ b/.github/workflows/test-spack.yml
@@ -19,7 +19,9 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.10']
-        spack-version: ['develop', 'latest_release']
+        # disable latest_release for now, pending a compatible buildcache
+        #spack-version: ['develop', 'latest_release']
+        spack-version: ['develop']
 
       fail-fast: false