diff --git a/environments/numlibs/spack.yaml b/environments/numlibs/spack.yaml
index ac36976..179f464 100644
--- a/environments/numlibs/spack.yaml
+++ b/environments/numlibs/spack.yaml
@@ -31,7 +31,7 @@ spack:
       - [$^mpis]
       - [$%compilers]
     - matrix:
-      - [superlu-dist]
+      - [superlu-dist, sundials]
       - [$rocm_variant]
       - [$num_integer_types]
       - [$num_lib_types]