Trigger out-of-memory process killer before lockup

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d89d7af1ba23bd8a5341d00bdd862e8e9a808f56' (2022-05-12)
  → 'github:NixOS/nixpkgs/fb222e008681fce4608e94f2d1dfdf3d03a364c4' (2022-05-13)

configuration.nix

@@ -148,6 +148,9 @@ in {
     ];
   };
 
+  # Trigger out-of-memory process killing earlier
+  services.earlyoom.enable = true;
+
   # Import other configuration modules
   imports = [
     ./modules/hardware-configuration.nix

flake.lock

@@ -38,11 +38,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1652172129,
+        "lastModified": 1652467128,
-        "narHash": "sha256-8e2JMrswaKe02P8rYfvIMoc59pNuw6h/GYu8DBE1c+0=",
+        "narHash": "sha256-1wuQ7QgPQ3tugYcoVMJ3pUzl4wVdBzKZr9qtJAgA4VI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f419dc5763c2b3c5580e396dea065b6d8b58ee27",
+        "rev": "fb222e008681fce4608e94f2d1dfdf3d03a364c4",
         "type": "github"
       },
       "original": {