add service module for system activation

2 files changed, 8 insertions, 13 deletions

diff --git a/modules/system/activation-scripts.nix b/modules/system/activation-scripts.nix
index fe3131d..fda882f 100644
--- a/modules/system/activation-scripts.nix
+++ b/modules/system/activation-scripts.nix
@@ -34,19 +34,6 @@ in
 
   config = {
 
-    system.build.activate = pkgs.writeScript "activate-system" ''
-      #! ${pkgs.stdenv.shell}
-
-      # Make this configuration the current configuration.
-      # The readlink is there to ensure that when $systemConfig = /system
-      # (which is a symlink to the store), /run/current-system is still
-      # used as a garbage collection root.
-      ln -sfn $(cat /nix/var/nix/profiles/system/systemConfig) /run/current-system
-
-      # Prevent the current configuration from being garbage-collected.
-      ln -sfn /run/current-system /nix/var/nix/gcroots/current-system
-    '';
-
     system.activationScripts.script.text = ''
       #! ${pkgs.stdenv.shell}
 
diff --git a/modules/system/default.nix b/modules/system/default.nix
index 9cf190e..d1d9f72 100644
--- a/modules/system/default.nix
+++ b/modules/system/default.nix
@@ -27,6 +27,14 @@ in
       '';
     };
 
+    system.profile = mkOption {
+      type = types.path;
+      default = "/nix/var/nix/profiles/system";
+      description = ''
+        Profile to use for the system.
+      '';
+    };
+
     system.nixdarwinLabel = mkOption {
       type = types.str;
       default = "16.09";