diff --git a/docs/default.nix b/docs/default.nix
index f66da68..55d16fe 100644
--- a/docs/default.nix
+++ b/docs/default.nix
@@ -3,6 +3,7 @@ let
 in
 {
   pkgs ? import sources.nixos-unstable { },
+  extraModules ? [ ],
 }:
 
 let
@@ -62,7 +63,7 @@ let
 
   wrapperManagerLib = (import ../. { }).lib;
   wmOptionsDoc = evalDoc {
-    modules = [ ../modules/wrapper-manager ];
+    modules = [ ../modules/wrapper-manager ] ++ extraModules;
     includeModuleSystemOptions = true;
   };
 
diff --git a/modules/env/common.nix b/modules/env/common.nix
index 71bfd91..b4c4111 100644
--- a/modules/env/common.nix
+++ b/modules/env/common.nix
@@ -135,6 +135,20 @@ in
     documentation = {
       manpage.enable = lib.mkEnableOption "manpage output";
       html.enable = lib.mkEnableOption "HTML output";
+
+      extraModules = lib.mkOption {
+        type = with lib.types; listOf deferredModule;
+        description = ''
+          List of extra wrapper-manager modules to be included as part of the
+          documentation.
+        '';
+        default = [ ];
+        example = lib.literalExpression ''
+          [
+            ./modules/wrapper-manager
+          ]
+        '';
+      };
     };
   };
 }
diff --git a/modules/env/home-manager/default.nix b/modules/env/home-manager/default.nix
index ab821f8..daa409f 100644
--- a/modules/env/home-manager/default.nix
+++ b/modules/env/home-manager/default.nix
@@ -7,7 +7,7 @@
 
 let
   cfg = config.wrapper-manager;
-  wmDocs = import ../../../docs { inherit pkgs; };
+  wmDocs = import ../../../docs { inherit pkgs; inherit (cfg.documentation) extraModules; };
 in
 {
   imports = [ ../common.nix ];
diff --git a/modules/env/nixos/default.nix b/modules/env/nixos/default.nix
index e6090c5..cb618d2 100644
--- a/modules/env/nixos/default.nix
+++ b/modules/env/nixos/default.nix
@@ -7,7 +7,7 @@
 
 let
   cfg = config.wrapper-manager;
-  wmDocs = import ../../../docs { inherit pkgs; };
+  wmDocs = import ../../../docs { inherit pkgs; inherit (cfg.documentation) extraModules; };
 in
 {
   imports = [ ../common.nix ];
@@ -33,7 +33,8 @@ in
     }
 
     (lib.mkIf (cfg.packages != { }) {
-      environment.systemPackages = lib.mapAttrsToList (_: wrapper: wrapper.build.toplevel) cfg.packages;
+      environment.systemPackages =
+        lib.mapAttrsToList (_: wrapper: wrapper.build.toplevel) cfg.packages;
     })
   ];
 }