diff --git a/lib/mkSystem.nix b/lib/mkSystem.nix
index f60c0d1..e959caa 100644
--- a/lib/mkSystem.nix
+++ b/lib/mkSystem.nix
@@ -43,6 +43,8 @@ in inputs.nixpkgs.lib.nixosSystem {
         emacs.overlay
         (import ../packages)
         (import ../overlays/simple.nix)
+
+        # Always keep sandbox.nix as the last overlay
         (import ../overlays/sandbox.nix)
       ];
     }
diff --git a/overlays/simple.nix b/overlays/simple.nix
index 241510b..d25d027 100644
--- a/overlays/simple.nix
+++ b/overlays/simple.nix
@@ -89,4 +89,13 @@ final: prev:
       sha256 = "1d17lvydlny9pvaxa9xy53wxs7i6d563lp5r9g3r1xpgnb7zli8v";
     };
   });
+
+  # TODO: Remove when updated in nixos-unstable
+  discord = prev.discord.overrideAttrs (old: {
+    version = "0.0.17";
+    src = prev.fetchurl {
+      url = "https://dl.discordapp.net/apps/linux/0.0.17/discord-0.0.17.tar.gz";
+      sha256 = "sha256-NGJzLl1dm7dfkB98pQR3gv4vlldrII6lOMWTuioDExU=";
+    };
+  });
 }