accountsservice: add support for mutableUsers = false

Add code to accountsservice that returns an error if the environment
variable NIXOS_USERS_PURE is set. This variable is set from the nixos
accountsservice module if mutableUsers = false

1 files changed, 8 insertions, 0 deletions

diff --git a/nixos/modules/services/desktops/accountsservice.nix b/nixos/modules/services/desktops/accountsservice.nix
index c28c2729576..2a7450669ea 100644
--- a/nixos/modules/services/desktops/accountsservice.nix
+++ b/nixos/modules/services/desktops/accountsservice.nix
@@ -35,6 +35,14 @@ with lib;
     services.dbus.packages = [ pkgs.accountsservice ];
 
     systemd.packages = [ pkgs.accountsservice ];
+
+    systemd.services.accounts-daemon= {
+
+      wantedBy = [ "graphical.target" ];
+
+    } // (mkIf (!config.users.mutableUsers) {
+      environment.NIXOS_USERS_PURE = "true";
+    });
   };
 
 }