diff --git a/shpc/defaults.py b/shpc/defaults.py
index 82c0960b3..007bd34ac 100644
--- a/shpc/defaults.py
+++ b/shpc/defaults.py
@@ -18,7 +18,7 @@
 )
 
 # variables in settings that allow environment variable expansion
-allowed_envars = ["container_base", "module_base", "views_base", "registry"]
+allowed_envars = ["container_base", "module_base", "views_base", "wrapper_base", "registry"]
 
 # The default GitHub registry with recipes (for docgen)
 github_url = "https://github.com/singularityhub/shpc-registry"