diff --git a/pkgs/os-specific/linux/firmware/fwupd/default.nix b/pkgs/os-specific/linux/firmware/fwupd/default.nix
index 610d12b551d4..36002d7f37d9 100644
--- a/pkgs/os-specific/linux/firmware/fwupd/default.nix
+++ b/pkgs/os-specific/linux/firmware/fwupd/default.nix
@@ -25,8 +25,8 @@ let version = "0.8.0"; in
         export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${efivar}/include/efivar"
       '';
       configureFlags =
-        [ "--with-systemdunitdir=$out/lib/systemd/system"
-          "--with-udevrulesdir=$out/lib/udev/rules.d"
+        [ "--with-systemdunitdir=$(out)/lib/systemd/system"
+          "--with-udevrulesdir=$(out)/lib/udev/rules.d"
         ];
       enableParallelBuilding = true;
       meta =