diff --git a/env/merlin/sysconfigs/modules.yaml b/env/merlin/sysconfigs/modules.yaml
new file mode 100644
index 0000000..a51232a
--- /dev/null
+++ b/env/merlin/sysconfigs/modules.yaml
@@ -0,0 +1,11 @@
+modules:
+  default:
+    enable:
+      - tcl
+    tcl:
+      all:
+        autoload: direct
+      projections:
+        root: /afs/psi.ch/sys/spack-rhel7/lmod
+        all: '{name}/{version}/{compiler.name}/{compiler.version}'
+        ^mpi: '{name}/{version}/{^mpi.name}/{^mpi.version}/{compiler.name}/{compiler.version}/module'