diff --git a/backend/Makefile b/backend/Makefile
index b06262a..2581480 100644
--- a/backend/Makefile
+++ b/backend/Makefile
@@ -26,7 +26,7 @@ frontend.o: frontend.import.scm
 frontend.import.scm: frontend.scm
 .PHONY: frontend.scm
 frontend.scm:
-	cd ../frontend && npm run build && cd ../backend && csi -b -q ../tools/schemify-tree.scm -- ../frontend/dist frontend frontend-lookup
+	cd ../frontend && (if [ -d src ] ; then npm run build ; fi ) && cd ../backend && csi -b -q ../tools/schemify-tree.scm -- ../frontend/dist frontend frontend-lookup
 
 brminv.o: $(BRMINV_SOURCES)
 
diff --git a/backend/brminv.scm b/backend/brminv.scm
index 4911524..4a80137 100644
--- a/backend/brminv.scm
+++ b/backend/brminv.scm
@@ -62,7 +62,10 @@
      (-certificate- cert))
  (-k (key) "Private key"
      (-key- key))
- )
+ (-u (user) "User to run as (if started as root)"
+     (-user- user))
+ (-g (group) "Group to run as (if started as root)"
+     (-group- group)))
 
 (define ssl? (and (-certificate-) (-key-) #t))
 (define port (or (-port-) (if ssl? 443 80)))