diff --git a/app/build_containers.py b/app/build_containers.py
index 5b85f5bf..017ea776 100644
--- a/app/build_containers.py
+++ b/app/build_containers.py
@@ -79,9 +79,8 @@ def command(ctx, include, exclude):
         if stack:
             print(f"Stack: {stack}")
 
-    # TODO: make this configurable
     container_build_env = {
-        "CERC_NPM_URL": "http://gitea.local:3000/api/packages/cerc-io/npm/",
+        "CERC_NPM_URL": config("CERC_NPM_URL", default="http://gitea.local:3000/api/packages/cerc-io/npm/"),
         "CERC_NPM_AUTH_TOKEN": config("CERC_NPM_AUTH_TOKEN", default="<token-not-supplied>"),
         "CERC_REPO_BASE_DIR": dev_root_path,
         "CERC_HOST_UID": f"{os.getuid()}",