Pindown molflow version.

env/openmpi_3/spack.yaml

@@ -20,6 +20,6 @@
     - py-pandas
     - py-tensorflow~cuda~nccl
     - protobuf@3.11.2
-    - molflow
+    - molflow@2.9.4_beta
   concretization: together
   view: false

repos/vae/packages/molflow/package.py

@@ -17,7 +17,7 @@ class Molflow(CMakePackage):
     version('2.9.3_beta', commit='26599088db87ddda2e3d1c5f6f9f2f93907873b9', submodules=True, no_cache=True)
 
     depends_on('cmake@3.12.2:', type='build')
-    depends_on('openmpi')
+    depends_on('openmpi', when='@2.9.4_beta:')
 
     def cmake_args(self):
         return [