Revert "tree-wide: remove nix-monitored"

This reverts commit da7e72db64.

nix/configurations/hetzner_benchmark.nix

@@ -40,9 +40,12 @@ in
 
           # use lix everywhere and wrap it with nom
           ../overlays/lix.nix
+          ../overlays/nix-monitored.nix
         ];
       };
 
+      nix.package = pkgs.nix-monitored;
+
       system.nixos =
         let
           rev = lib.substring 0 8 sources.nixpkgs.revision;

nix/configurations/hydrogen.nix

@@ -45,9 +45,12 @@ in
 
           # use lix everywhere and wrap it with nom
           ../overlays/lix.nix
+          ../overlays/nix-monitored.nix
         ];
       };
 
+      nix.package = pkgs.nix-monitored;
+
       system.nixos =
         let
           rev = lib.substring 0 8 sources.nixpkgs.revision;

nix/overlays/nix-monitored.nix

@@ -0,0 +1,10 @@
+let
+  sources = import ../../npins;
+in
+# The final nix is lix in this case
+final: prev: {
+  nix-monitored = sources.nix-monitored.asFlake.packages.${final.stdenv.hostPlatform.system}.default.override {
+    inherit (final) nix;
+    withNotify = false; # noisy, spams "command completed" even for nix shells
+  };
+}

npins/sources.json

@@ -148,6 +148,20 @@
       "url": "https://github.com/oxalica/nil/archive/504599f7e555a249d6754698473124018b80d121.tar.gz",
       "hash": "1mzx60999jciq2ax1l5ajmks6fb3cmjavn7fsyh4aysvcdgzrj6p"
     },
+    "nix-monitored": {
+      "type": "Git",
+      "repository": {
+        "type": "GitHub",
+        "owner": "ners",
+        "repo": "nix-monitored"
+      },
+      "branch": "master",
+      "submodules": false,
+      "revision": "60f3baa4701d58eab86c2d1d9c3d7e820074d461",
+      "url": "https://github.com/ners/nix-monitored/archive/60f3baa4701d58eab86c2d1d9c3d7e820074d461.tar.gz",
+      "hash": "1rdyjmxkvyqd5blbzbwfv2b99krx6rkpdzi1ckyby8i676gf9hv7",
+      "frozen": true
+    },
     "nixos-hardware": {
       "type": "Git",
       "repository": {