From 130aeb36b7d9d303a2b4a3a20e2978435afd2469 Mon Sep 17 00:00:00 2001
From: Qubasa <consulting@qube.email>
Date: Mon, 11 Nov 2024 21:50:25 +0700
Subject: [PATCH] Revert "clan: Remove pkgsForSystem"

This reverts commit 382e27a20b9a22faa200941a27a794e1d73fcadf.
---
 lib/build-clan/interface.nix | 14 ++++++++++++--
 lib/build-clan/module.nix    |  5 +++--
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/lib/build-clan/interface.nix b/lib/build-clan/interface.nix
index df4743980..8dd3abf74 100644
--- a/lib/build-clan/interface.nix
+++ b/lib/build-clan/interface.nix
@@ -3,7 +3,6 @@ let
   types = lib.types;
 in
 {
-
   options = {
     # Required options
     directory = lib.mkOption {
@@ -70,6 +69,18 @@ in
       default = { };
     };
 
+    pkgsForSystem = lib.mkOption {
+      type = types.functionTo (types.nullOr types.attrs);
+      default = _: null;
+      defaultText = "Lambda :: String -> { ... } | null";
+      description = ''
+        A function that maps from architecture to pkg. `( string -> pkgs )`
+
+        If specified this nixpkgs will be only imported once for each system.
+        This improves performance, but all nipxkgs.* options will be ignored.
+      '';
+    };
+
     # Outputs
     nixosConfigurations = lib.mkOption {
       # Hide from documentation.
@@ -101,5 +112,4 @@ in
       };
     };
   };
-
 }
diff --git a/lib/build-clan/module.nix b/lib/build-clan/module.nix
index 072b16c98..016f9baf3 100644
--- a/lib/build-clan/module.nix
+++ b/lib/build-clan/module.nix
@@ -9,6 +9,7 @@ let
   inherit (config)
     directory
     machines
+    pkgsForSystem
     specialArgs
     ;
 
@@ -57,7 +58,7 @@ let
               # Settings
               clan.core.clanDir = directory;
               # Inherited from clan wide settings
-              # TODO: remove these`
+              # TODO: remove these
               clan.core.name = config.inventory.meta.name;
               clan.core.icon = config.inventory.meta.icon;
 
@@ -126,7 +127,7 @@ let
             args
             // {
               inherit name system;
-              pkgs = nixpkgs.legacyPackages.${system};
+              pkgs = pkgsForSystem system;
             }
           )
         ) allMachines