diff --git a/config.env b/config.env
new file mode 100644
index 0000000..2e6d554
--- /dev/null
+++ b/config.env
@@ -0,0 +1,8 @@
+LINKML_GENERATORS_PROJECT_ARGS=--config-file config.yaml
+
+### Extra layer of configuration for Makefile beyond
+### what 'gen-project --config-file config.yaml' provides.
+### Uncomment and set environment variables as needed.
+
+# LINKML_GENERATORS_MARKDOWN_ARGS=--no-mergeimports
+
diff --git a/config.yaml b/config.yaml
new file mode 100644
index 0000000..56da66d
--- /dev/null
+++ b/config.yaml
@@ -0,0 +1,41 @@
+# Configuration of generators (defaults illustrated)
+---
+generator_args:
+  excel:
+    mergeimports: true
+  owl:
+    mergeimports: true
+    metaclasses: true
+    type_objects: true
+    # throws 'Cannot handle metadata profile: rdfs'
+    # metadata_profile: rdfs
+  markdown:
+    mergeimports: true
+  graphql:
+    mergeimports: true
+  java:
+    mergeimports: true
+    metadata: true
+  jsonld:
+    mergeimports: true
+  jsonschema:
+    mergeimports: true
+  jsonldcontext:
+    mergeimports: true
+  python:
+    mergeimports: true
+  prefixmap:
+    mergeimports: true
+  proto:
+    mergeimports: true
+  shacl:
+    mergeimports: true
+  shex:
+    mergeimports: true
+  sqlddl:
+    mergeimports: true
+  typescript:
+    mergeimports: true
+    metadata: true
+
+...