diff --git a/nixos/modules/services/system/nix-daemon.nix b/nixos/modules/services/system/nix-daemon.nix
index bc5bbcf06cf1..8a8b746e5544 100644
--- a/nixos/modules/services/system/nix-daemon.nix
+++ b/nixos/modules/services/system/nix-daemon.nix
@@ -230,6 +230,7 @@ in
         IOSchedulingPriority = cfg.daemonIOSchedPriority;
         LimitNOFILE = 1048576;
         Delegate = "yes";
+        DelegateSubgroup = "supervisor";
       };
 
       restartTriggers = [ config.environment.etc."nix/nix.conf".source ];
diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index 56f1b4f19bfb..166eb32090c6 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -722,6 +722,10 @@ let
                   libxml2.bin
                   libxslt.bin
                   nixos-artwork.wallpapers.simple-dark-gray-bottom
+                  (nixos-rebuild-ng.override {
+                    withNgSuffix = false;
+                    withReexec = true;
+                  })
                   ntp
                   perlPackages.ConfigIniFiles
                   perlPackages.FileSlurp
@@ -1110,7 +1114,7 @@ in
   simple = makeInstallerTest "simple" (
     simple-test-config
     // {
-      passthru.override = args: makeInstallerTest "simple" simple-test-config // args;
+      passthru.override = args: makeInstallerTest "simple" (simple-test-config // args);
     }
   );
 
diff --git a/pkgs/tools/package-management/lix/common-lix.nix b/pkgs/tools/package-management/lix/common-lix.nix
index df64103e8a45..9b666e5e78fb 100644
--- a/pkgs/tools/package-management/lix/common-lix.nix
+++ b/pkgs/tools/package-management/lix/common-lix.nix
@@ -139,6 +139,7 @@ stdenv.mkDerivation (finalAttrs: {
         p.pytest
         p.pytest-xdist
         p.python-frontmatter
+        p.toml
       ]))
       pkg-config
       flex
diff --git a/pkgs/tools/package-management/lix/default.nix b/pkgs/tools/package-management/lix/default.nix
index 28f368731118..c6d905d78048 100644
--- a/pkgs/tools/package-management/lix/default.nix
+++ b/pkgs/tools/package-management/lix/default.nix
@@ -234,14 +234,14 @@ lib.makeExtensible (self: {
     attrName = "git";
 
     lix-args = rec {
-      version = "2.94.0-pre-20250516_${builtins.substring 0 12 src.rev}";
+      version = "2.94.0-pre-20250621_${builtins.substring 0 12 src.rev}";
 
       src = fetchFromGitea {
         domain = "git.lix.systems";
         owner = "lix-project";
         repo = "lix";
-        rev = "a7634f87aac545fa01fa19878cc5ad2c994e2116";
-        hash = "sha256-+yX+xF1cZUd1Pub7MJ7uGcC6JQ0FN+CsEmBg6rGLfjU=";
+        rev = "242a228124f77b57c2e3b3aedb259ffb7913cd3c";
+        hash = "sha256-hCbhc9P+UmIlYv81+vs6v3bDqviCUhwPH3XqClZdfSk=";
       };
 
       cargoDeps = rustPlatform.fetchCargoVendor {