fix(nix): remove old generations

flake.lock

@@ -18,6 +18,27 @@
         "type": "github"
       }
     },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "neovim-nightly",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1769996383,
+        "narHash": "sha256-AnYjnFWgS49RlqX7LrC4uA+sCCDBj0Ry/WOJ5XWAsa0=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "57928607ea566b5db3ad13af0e57e921e6b12381",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -59,6 +80,42 @@
         "type": "github"
       }
     },
+    "neovim-nightly": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "neovim-src": "neovim-src",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1771977871,
+        "narHash": "sha256-lhmPJpB4V67O7rpTxb637yYX4C4PyhlnCGk+hrpjiyA=",
+        "owner": "nix-community",
+        "repo": "neovim-nightly-overlay",
+        "rev": "76b7e0e4f7ed155a090a551cd2ab3e7cd81eb6c3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "neovim-nightly-overlay",
+        "type": "github"
+      }
+    },
+    "neovim-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1771977223,
+        "narHash": "sha256-RAPxiR+GFi+eH8Hd8zP9Pg4ZRwAwGiCN+HOt9K5LMb4=",
+        "owner": "neovim",
+        "repo": "neovim",
+        "rev": "327dcb897024159bdb201caf23d8d5673d7a0567",
+        "type": "github"
+      },
+      "original": {
+        "owner": "neovim",
+        "repo": "neovim",
+        "type": "github"
+      }
+    },
     "nixos-hardware": {
       "locked": {
         "lastModified": 1771969195,
@@ -91,6 +148,22 @@
       }
     },
     "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1771923393,
+        "narHash": "sha256-Fy0+UXELv9hOE8WjYhJt8fMDLYTU2Dqn3cX4BwoGBos=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ea7f1f06811ce7fcc81d6c6fd4213150c23edcf2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
       "locked": {
         "lastModified": 1771923393,
         "narHash": "sha256-Fy0+UXELv9hOE8WjYhJt8fMDLYTU2Dqn3cX4BwoGBos=",
@@ -106,7 +179,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_3": {
+    "nixpkgs_4": {
       "locked": {
         "lastModified": 1771369470,
         "narHash": "sha256-0NBlEBKkN3lufyvFegY4TYv5mCNHbi5OmBDrzihbBMQ=",
@@ -126,15 +199,16 @@
       "inputs": {
         "claude-code": "claude-code",
         "home-manager": "home-manager",
+        "neovim-nightly": "neovim-nightly",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs_2",
+        "nixpkgs": "nixpkgs_3",
         "zen-browser": "zen-browser"
       }
     },
     "zen-browser": {
       "inputs": {
         "home-manager": "home-manager_2",
-        "nixpkgs": "nixpkgs_3"
+        "nixpkgs": "nixpkgs_4"
       },
       "locked": {
         "lastModified": 1771982860,

hosts/xps15/configuration.nix

@@ -194,5 +194,8 @@ in
     options = "--delete-older-than 7d";
   };
 
+  systemd.services.nix-gc.serviceConfig.ExecStartPost =
+    "/nix/var/nix/profiles/system/bin/switch-to-configuration boot";
+
   system.stateVersion = "24.11";
 }