From 090989e5819b4177183443e8695d6f0bdaa0a00a Mon Sep 17 00:00:00 2001
From: Elias Kohout <elias@kohout.de>
Date: Tue, 7 Apr 2026 03:05:24 +0200
Subject: [PATCH] Make home-manager optional per-host via enableHomeManager
 flag

---
 flake.nix | 88 +++++++++++++++++++++++++++++--------------------------
 1 file changed, 47 insertions(+), 41 deletions(-)

diff --git a/flake.nix b/flake.nix
index 9a9ec4e..047fdb6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,36 +45,41 @@
       mkOverlayUnstable = system:
         final: prev: { unstable = mkPkgsUnstable system; };
 
-      # Helper that builds a full NixOS configuration for a given host + arch
-      mkNixosSystem = { system, hostModule }: nixpkgs.lib.nixosSystem {
-        inherit system;
+      # Helper that builds a full NixOS configuration for a given host + arch.
+      # Set enableHomeManager = false for servers or minimal installs that
+      # don't need user-level dotfile/package management.
+      mkNixosSystem = { system, hostModule, enableHomeManager ? true }:
+        let
+          hmModules = if enableHomeManager then [
+            home-manager.nixosModules.home-manager
+            {
+              home-manager.useGlobalPkgs = true;
+              home-manager.useUserPackages = true;
+              home-manager.extraSpecialArgs = {
+                inherit sops-nix;
+                pkgs-unstable = mkPkgsUnstable system;
+              };
+              home-manager.users.youruser = import ./home/default.nix;
+            }
+          ] else [];
+        in nixpkgs.lib.nixosSystem {
+          inherit system;
 
-        specialArgs = {
-          inherit sops-nix disko;
-          pkgs-unstable = mkPkgsUnstable system;
+          specialArgs = {
+            inherit sops-nix disko;
+            pkgs-unstable = mkPkgsUnstable system;
+          };
+
+          modules = [
+            (mkOverlayUnstable system)
+            sops-nix.nixosModules.sops
+            disko.nixosModules.disko
+
+            hostModule
+            ./nixos/default.nix
+          ] ++ hmModules;
         };
 
-        modules = [
-          (mkOverlayUnstable system)
-          sops-nix.nixosModules.sops
-          disko.nixosModules.disko
-
-          hostModule
-          ./nixos/default.nix
-
-          home-manager.nixosModules.home-manager
-          {
-            home-manager.useGlobalPkgs = true;
-            home-manager.useUserPackages = true;
-            home-manager.extraSpecialArgs = {
-              inherit sops-nix;
-              pkgs-unstable = mkPkgsUnstable system;
-            };
-            home-manager.users.youruser = import ./home/default.nix;
-          }
-        ];
-      };
-
       # Default system for devShell and standalone home-manager
       defaultSystem = "x86_64-linux";
       pkgs = mkPkgs defaultSystem;
@@ -93,10 +98,11 @@
           hostModule = ./hosts/laptop/default.nix;
         };
 
-        # x86_64 server
+        # x86_64 server (no home-manager — minimal system-only config)
         server = mkNixosSystem {
           system = "x86_64-linux";
           hostModule = ./hosts/server/default.nix;
+          enableHomeManager = false;
         };
 
         # Example: ARM64 host (e.g. Raspberry Pi 4, Apple Silicon VM)
@@ -112,7 +118,7 @@
 
       homeConfigurations = {
         # x86_64 Linux
-        "youruser@linux" = home-manager.lib.homeManagerConfiguration {
+        "eliaskohout@linux" = home-manager.lib.homeManagerConfiguration {
           pkgs = mkPkgs "x86_64-linux";
           extraSpecialArgs = {
             pkgs-unstable = mkPkgsUnstable "x86_64-linux";
@@ -124,18 +130,18 @@
           ];
         };
 
-        # aarch64 Linux (e.g. Raspberry Pi, ARM servers)
-        # "youruser@linux-arm" = home-manager.lib.homeManagerConfiguration {
-        #   pkgs = mkPkgs "aarch64-linux";
-        #   extraSpecialArgs = {
-        #     pkgs-unstable = mkPkgsUnstable "aarch64-linux";
-        #     sops-nix = sops-nix;
-        #   };
-        #   modules = [
-        #     (mkOverlayUnstable "aarch64-linux")
-        #     ./home/default.nix
-        #   ];
-        # };
+        # aarch64 Linux
+        "eliaskohout@linux-arm" = home-manager.lib.homeManagerConfiguration {
+          pkgs = mkPkgs "aarch64-linux";
+          extraSpecialArgs = {
+            pkgs-unstable = mkPkgsUnstable "aarch64-linux";
+            sops-nix = sops-nix;
+          };
+          modules = [
+            (mkOverlayUnstable "aarch64-linux")
+            ./home/default.nix
+          ];
+        };
       };
 
       # ============================================