diff --git a/global/software-configuration.nix b/global/software-configuration.nix
index 8781a0a..56594e4 100644
--- a/global/software-configuration.nix
+++ b/global/software-configuration.nix
@@ -40,7 +40,7 @@ in
         peer-port-random-low = 42333;
         peer-port-random-on-start = true;
         incomplete-dir-enabled = false;
-        incomplete-dir = downloadDir ++ ".incomplete";
+        incomplete-dir = "${downloadDir}.incomplete";
       };
     };