diff --git a/modules/flake-parts/setups/home-manager.nix b/modules/flake-parts/setups/home-manager.nix
index 617d5fb0..2a5fcc87 100644
--- a/modules/flake-parts/setups/home-manager.nix
+++ b/modules/flake-parts/setups/home-manager.nix
@@ -12,12 +12,13 @@ let
     , nixpkgsBranch ? "nixpkgs"
     , homeManagerBranch ? "home-manager"
     , extraModules ? [ ]
+    , specialArgs ? { }
     }:
     let
       pkgs = inputs.${nixpkgsBranch}.legacyPackages.${system};
     in
     inputs.${homeManagerBranch}.lib.homeManagerConfiguration {
-      extraSpecialArgs = {
+      extraSpecialArgs = specialArgs // {
         foodogsquaredModulesPath = builtins.toString homeManagerModules;
       };
 
diff --git a/modules/flake-parts/setups/nixos.nix b/modules/flake-parts/setups/nixos.nix
index f9e73cdc..e58e553a 100644
--- a/modules/flake-parts/setups/nixos.nix
+++ b/modules/flake-parts/setups/nixos.nix
@@ -13,7 +13,7 @@ let
   partsConfig = config;
 
   # A thin wrapper around the NixOS configuration function.
-  mkHost = { extraModules ? [ ], nixpkgsBranch ? "nixpkgs", system }:
+  mkHost = { system ,extraModules ? [ ], nixpkgsBranch ? "nixpkgs", specialArgs ? { } }:
     let
       nixpkgs = inputs.${nixpkgsBranch};
 
@@ -25,7 +25,7 @@ let
       nixosSystem = args: import "${nixpkgs}/nixos/lib/eval-config.nix" args;
     in
     (lib.makeOverridable nixosSystem) {
-      specialArgs = {
+      specialArgs = specialArgs // {
         foodogsquaredUtils = import ../../../lib/utils/nixos.nix { inherit lib; };
         foodogsquaredModulesPath = builtins.toString nixosModules;
       };
diff --git a/modules/flake-parts/setups/nixvim.nix b/modules/flake-parts/setups/nixvim.nix
index 28ecf6c8..93e78e3f 100644
--- a/modules/flake-parts/setups/nixvim.nix
+++ b/modules/flake-parts/setups/nixvim.nix
@@ -9,13 +9,19 @@ let
   cfg = config.setups.nixvim;
   nixvimModules = ../../nixvim;
 
-  mkNixvimConfig = { system, pkgs, nixvimBranch ? "nixvim", modules ? [ ] }:
+  mkNixvimConfig = {
+    system,
+    pkgs,
+    nixvimBranch ? "nixvim",
+    modules ? [ ],
+    specialArgs ? { },
+  }:
     inputs.${nixvimBranch}.legacyPackages.${system}.makeNixvimWithModule {
       inherit pkgs;
       module = {
         imports = modules;
       };
-      extraSpecialArgs = {
+      extraSpecialArgs = specialArgs // {
         foodogsquaredModulesPath = builtins.toString nixvimModules;
       };
     };