diff --git a/Makefile b/Makefile
index abbe9a303..032cf460a 100644
--- a/Makefile
+++ b/Makefile
@@ -190,7 +190,7 @@ well-known: static;
 
 # HELP(test-backend): test backend
 --test-backend:
-	stack build --test --coverage --fast --workdir .stack-work-test --flag uniworx:library-only $(stackopts)
+	stack build --test --coverage --fast --work-dir .stack-work-test --flag uniworx:library-only $(stackopts)
 
 # TODO: better name
 .PHONY: db