diff --git a/public/environment.nix b/public/environment.nix
index 3255841..08a0320 100644
--- a/public/environment.nix
+++ b/public/environment.nix
@@ -59,6 +59,10 @@ in
     };
     etc.gitconfig.text = builtins.readFile ./gitconfig;
   };
+  # programmes qui n'ont pas besoin de sudo pour fonctionner
+  security.setuidPrograms = [
+    "mtr"
+  ];
   programs.bash = {
     enableCompletion = true;
     promptInit = builtins.readFile ./bash-prompt.sh;