diff --git a/env/merlin/spack.yaml b/env/merlin/spack.yaml
index c73802d..5742488 100644
--- a/env/merlin/spack.yaml
+++ b/env/merlin/spack.yaml
@@ -11,10 +11,3 @@ spack:
   view: true
   concretizer:
     unify: false
-  specs:
-  - zlib@1.2.12
-  modules:
-    default:
-      lmod:
-        core_compilers:
-        - gcc@4.8.5