diff --git a/pkgs/tools/security/fwbuilder/default.nix b/pkgs/tools/security/fwbuilder/default.nix
index 66d7a5a7537..398e552ffe4 100644
--- a/pkgs/tools/security/fwbuilder/default.nix
+++ b/pkgs/tools/security/fwbuilder/default.nix
@@ -16,6 +16,10 @@ stdenv.mkDerivation rec {
     wrapQtAppsHook
   ];
 
+  NIX_CFLAGS_COMPILE = [
+    "-Wno-error=misleading-indentation"
+  ];
+
   meta = with lib; {
     description = "GUI Firewall Management Application";
     homepage    = "https://github.com/fwbuilder/fwbuilder";