flake: refactor, bye srid

Refactor flake to work without nixos-flake and use native NixOS module
system. This is because of recent changes to nixos-flake, like renaming it
to nixos-unified and changing the API without a changelog or guide how
to update.

flake.lock

@@ -318,21 +318,6 @@
         "type": "github"
       }
     },
-    "nixos-flake": {
-      "locked": {
-        "lastModified": 1728073820,
-        "narHash": "sha256-H6DC2OCW8BKzja+1oHGTjw9EN5w+4Op9PnVjKL8EJbI=",
-        "owner": "srid",
-        "repo": "nixos-flake",
-        "rev": "47a26bc9118d17500bbe0c4adb5ebc26f776cc36",
-        "type": "github"
-      },
-      "original": {
-        "owner": "srid",
-        "repo": "nixos-flake",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1728067476,
@@ -373,7 +358,6 @@
         "keycloak-theme-pub-solar": "keycloak-theme-pub-solar",
         "maunium-stickerpicker": "maunium-stickerpicker",
         "nix-darwin": "nix-darwin",
-        "nixos-flake": "nixos-flake",
         "nixpkgs": "nixpkgs",
         "simple-nixos-mailserver": "simple-nixos-mailserver",
         "unstable": "unstable"

flake.nix

@@ -11,7 +11,6 @@
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
 
     flake-parts.url = "github:hercules-ci/flake-parts";
-    nixos-flake.url = "github:srid/nixos-flake";
 
     deploy-rs.url = "github:serokell/deploy-rs";
     deploy-rs.inputs.nixpkgs.follows = "nixpkgs";
@@ -51,7 +50,6 @@
       ];
 
       imports = [
-        inputs.nixos-flake.flakeModule
         ./logins
         ./lib
         ./overlays

hosts/default.nix

@@ -1,9 +1,35 @@
-{ self, ... }:
+{
+  self,
+  inputs,
+  config,
+  ...
+}:
 {
   flake = {
-    nixosConfigurations = {
+    nixosModules = {
-      nachtigall = self.nixos-flake.lib.mkLinuxSystem {
+      home-manager = {
         imports = [
+          inputs.home-manager.nixosModules.home-manager
+          ({
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.extraSpecialArgs = {
+              flake = {
+                inherit self inputs config;
+              };
+            };
+          })
+        ];
+      };
+    };
+    nixosConfigurations = {
+      nachtigall = self.inputs.nixpkgs.lib.nixosSystem {
+        specialArgs = {
+          flake = {
+            inherit self inputs config;
+          };
+        };
+        modules = [
           self.inputs.agenix.nixosModules.default
           self.nixosModules.home-manager
           ./nachtigall
@@ -43,8 +69,13 @@
         ];
       };
 
-      metronom = self.nixos-flake.lib.mkLinuxSystem {
+      metronom = self.inputs.nixpkgs.lib.nixosSystem {
-        imports = [
+        specialArgs = {
+          flake = {
+            inherit self inputs config;
+          };
+        };
+        modules = [
           self.inputs.agenix.nixosModules.default
           self.nixosModules.home-manager
           ./metronom
@@ -60,8 +91,13 @@
         ];
       };
 
-      tankstelle = self.nixos-flake.lib.mkLinuxSystem {
+      tankstelle = self.inputs.nixpkgs.lib.nixosSystem {
-        imports = [
+        specialArgs = {
+          flake = {
+            inherit self inputs config;
+          };
+        };
+        modules = [
           self.inputs.agenix.nixosModules.default
           self.nixosModules.home-manager
           ./tankstelle
@@ -73,8 +109,13 @@
         ];
       };
 
-      trinkgenossin = self.nixos-flake.lib.mkLinuxSystem {
+      trinkgenossin = self.inputs.nixpkgs.lib.nixosSystem {
-        imports = [
+        specialArgs = {
+          flake = {
+            inherit self inputs config;
+          };
+        };
+        modules = [
           self.inputs.agenix.nixosModules.default
           self.nixosModules.home-manager
           ./trinkgenossin
@@ -94,8 +135,13 @@
         ];
       };
 
-      delite = self.nixos-flake.lib.mkLinuxSystem {
+      delite = self.inputs.nixpkgs.lib.nixosSystem {
-        imports = [
+        specialArgs = {
+          flake = {
+            inherit self inputs config;
+          };
+        };
+        modules = [
           self.inputs.agenix.nixosModules.default
           self.inputs.disko.nixosModules.disko
           self.nixosModules.home-manager
@@ -111,8 +157,13 @@
         ];
       };
 
-      blue-shell = self.nixos-flake.lib.mkLinuxSystem {
+      blue-shell = self.inputs.nixpkgs.lib.nixosSystem {
-        imports = [
+        specialArgs = {
+          flake = {
+            inherit self inputs config;
+          };
+        };
+        modules = [
           self.inputs.agenix.nixosModules.default
           self.inputs.disko.nixosModules.disko
           self.nixosModules.home-manager