diff --git a/stacks/pinot-noir-gcc/spack.yaml b/stacks/pinot-noir-gcc/spack.yaml
index 194bc387ba5b98af2b4f2e450f34cc6811d09168..bed7ee0ce8502d141e7c440f61e9c2839be00152 100644
--- a/stacks/pinot-noir-gcc/spack.yaml
+++ b/stacks/pinot-noir-gcc/spack.yaml
@@ -59,6 +59,9 @@ spack:
     - serial_codes:
         - python
 
+    - mpi_codes:
+        - ior
+
     # -------------------------------------------------------------------------
     # Empty to specialize in environments
     # -------------------------------------------------------------------------
@@ -94,6 +97,11 @@ spack:
         - [$cuda_serial_codes]
         - [$%compiler_gcc]
 
+    - matrix:
+        - [$mpi_codes]
+        - [$%compiler_gcc]
+        - [$%mpi_gcc]
+
   view: false
 #    default:
 #      root: /stack/packages/