diff --git a/containers/azimuth/pipeline.cwl b/containers/azimuth/pipeline.cwl
index b288dfe..9b143eb 100644
--- a/containers/azimuth/pipeline.cwl
+++ b/containers/azimuth/pipeline.cwl
@@ -7,7 +7,7 @@ requirements:
     dockerPull: ghcr.io/hubmapconsortium/hra-workflows/azimuth:main
   EnvVarRequirement:
     envDef:
-      R_LIBS: $(inputs.options.referenceDataDir)
+      R_LIBS: $(inputs.options.referenceDataDir.path)
   SchemaDefRequirement:
     types:
       - $import: ./options.yml