diff --git a/nixos/default.nix b/nixos/default.nix
index 5328e578..4628d1f2 100644
--- a/nixos/default.nix
+++ b/nixos/default.nix
@@ -60,28 +60,31 @@ in
       }) cfg.users
     );
 
-    systemd.services = mapAttrs' (username: usercfg:
-      nameValuePair ("home-manager-${utils.escapeSystemdPath username}") {
-        description = "Home Manager environment for ${username}";
-        wantedBy = [ "multi-user.target" ];
-        wants = [ "nix-daemon.socket" ];
-        after = [ "nix-daemon.socket" ];
+    systemd.services = mapAttrs' (_: usercfg:
+      let
+        username = usercfg.home.username;
+      in
+        nameValuePair ("home-manager-${utils.escapeSystemdPath username}") {
+          description = "Home Manager environment for ${username}";
+          wantedBy = [ "multi-user.target" ];
+          wants = [ "nix-daemon.socket" ];
+          after = [ "nix-daemon.socket" ];
 
-        serviceConfig = {
-          User = usercfg.home.username;
-          Type = "oneshot";
-          RemainAfterExit = "yes";
-          SyslogIdentifier = "hm-activate-${username}";
+          serviceConfig = {
+            User = usercfg.home.username;
+            Type = "oneshot";
+            RemainAfterExit = "yes";
+            SyslogIdentifier = "hm-activate-${username}";
 
-          # The activation script is run by a login shell to make sure
-          # that the user is given a sane Nix environment.
-          ExecStart = pkgs.writeScript "activate-${username}" ''
-            #! ${pkgs.stdenv.shell} -el
-            echo Activating home-manager configuration for ${username}
-            exec ${usercfg.home.activationPackage}/activate
-          '';
-        };
-      }
+            # The activation script is run by a login shell to make sure
+            # that the user is given a sane Nix environment.
+            ExecStart = pkgs.writeScript "activate-${username}" ''
+              #! ${pkgs.stdenv.shell} -el
+              echo Activating home-manager configuration for ${username}
+              exec ${usercfg.home.activationPackage}/activate
+            '';
+          };
+        }
     ) cfg.users;
   };
 }