4 files changed, 9 insertions, 2 deletions
diff --git a/nixos/lib/eval-cacheable-options.nix b/nixos/lib/eval-cacheable-options.nix
index c3ba2ce663758..d26967ebe09b8 100644
--- a/nixos/lib/eval-cacheable-options.nix
+++ b/nixos/lib/eval-cacheable-options.nix
@@ -33,6 +33,7 @@ let
     ];
     specialArgs = {
       inherit config pkgs utils;
+      class = "nixos";
     };
   };
   docs = import "${nixosPath}/doc/manual" {
diff --git a/nixos/lib/eval-config-minimal.nix b/nixos/lib/eval-config-minimal.nix
index d45b9ffd42618..7e28f43051271 100644
--- a/nixos/lib/eval-config-minimal.nix
+++ b/nixos/lib/eval-config-minimal.nix
@@ -40,7 +40,9 @@ let
     inherit prefix modules;
     specialArgs = {
       modulesPath = builtins.toString ../modules;
-    } // specialArgs;
+    } // specialArgs // {
+      class = "nixos";
+    };
   };
 
 in
diff --git a/nixos/lib/testing/default.nix b/nixos/lib/testing/default.nix
index 9d4f9dbc43d76..1bd6278ce6844 100644
--- a/nixos/lib/testing/default.nix
+++ b/nixos/lib/testing/default.nix
@@ -1,7 +1,10 @@
 { lib }:
 let
 
-  evalTest = module: lib.evalModules { modules = testModules ++ [ module ]; };
+  evalTest = module: lib.evalModules {
+    modules = testModules ++ [ module ];
+    specialArgs.class = "nixosTest";
+  };
   runTest = module: (evalTest ({ config, ... }: { imports = [ module ]; result = config.test; })).config.result;
 
   testModules = [
diff --git a/nixos/modules/misc/documentation.nix b/nixos/modules/misc/documentation.nix
index e0c6af4abe106..1821dd866cb13 100644
--- a/nixos/modules/misc/documentation.nix
+++ b/nixos/modules/misc/documentation.nix
@@ -39,6 +39,7 @@ let
             _module.check = false;
           } ] ++ docModules.eager;
           specialArgs = specialArgs // {
+            class = "nixos";
             pkgs = scrubDerivations "pkgs" pkgs;
             # allow access to arbitrary options for eager modules, eg for getting
             # option types from lazy modules