diff --git a/pkgs/desktops/rox/rox-filer/default.nix b/pkgs/desktops/rox/rox-filer/default.nix
index b8d0b1c5b3cc..cffa6eca1bf7 100644
--- a/pkgs/desktops/rox/rox-filer/default.nix
+++ b/pkgs/desktops/rox/rox-filer/default.nix
@@ -31,6 +31,7 @@ stdenv.mkDerivation rec {
     libSM
   ];
   NIX_LDFLAGS = "-lm";
+  NIX_CFLAGS_COMPILE = " -fpermissive";
 
   patches = [
     ./rox-filer-2.11-in-source-build.patch