added overlay for nixpkgs testing of PRs.

configs/home-manager/common.nix

@@ -1,4 +1,5 @@
 {
+  inputs,
   config,
   pkgs,
   lib,
@@ -9,11 +10,17 @@
   # Let Home Manager install and manage itself on non-nixos systems.
   programs.home-manager.enable = config.targets.genericLinux.enable;
 
-  services.home-manager.autoExpire = {
+  nixpkgs.overlays = lib.mkIf (config.targets.genericLinux.enable && (inputs ? nixpkgs-fork)) [
+    (final: prev: {
+      fork = inputs.nixpkgs-fork.legacyPackages.${prev.system};
+    })
+  ];
+
+  services.home-manager.autoExpire = lib.mkIf config.targets.genericLinux.enable {
     enable = true;
     store = {
       cleanup = true;
-      options = "--delete-older-than 30d";
+      options = "--delete-older-than 7d";
     };
   };
 

configs/nixos/common.nix

@@ -25,6 +25,12 @@ in {
     };
   };
 
+  nixpkgs.overlays = lib.mkIf (inputs ? nixpkgs-fork) [
+    (final: prev: {
+      fork = inputs.nixpkgs-fork.legacyPackages.${prev.system};
+    })
+  ];
+
   # Allow unfree packages
   nixpkgs.config.allowUnfree = true;
 

flake.nix

@@ -5,6 +5,8 @@
     # Nixpkgs
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
 
+    # nixpkgs-fork.url="github:gabevenberg/nixpkgs/nixos-unstable";
+
     nixos-wsl = {
       url = "github:nix-community/NixOS-WSL/main";
       inputs.nixpkgs.follows = "nixpkgs";

hosts/harmatan/default.nix

@@ -47,15 +47,15 @@ inputs.nixpkgs.lib.nixosSystem {
 
       nixpkgs.overlays = let
         args = "--force-device-scale-factor=2";
-        desktopItemModifier = e: rec {
-          desktopItem = e.desktopItem.override (d: {
-            exec = "${d.exec} ${args}";
+        desktopItemModifier = prevAttrs: {
+          desktopItem = prevAttrs.desktopItem.override (prev: {
+            exec = "${prev.exec} ${args}";
           });
         };
-        desktopItemsModifier = e: rec {
+        desktopItemsModifier = previousAttrs: {
           desktopItems = [
-            ((builtins.head e.desktopItems).override (d: {
-              exec = "${d.exec} ${args}";
+            ((builtins.head previousAttrs.desktopItems).override (prev: {
+              exec = "${prev.exec} ${args}";
             }))
           ];
         };

roles/home-manager/eda.nix

@@ -1,4 +1,5 @@
 {
+  inputs,
   config,
   pkgs,
   lib,
@@ -6,5 +7,6 @@
 }: {
   home.packages = with pkgs; [
     kicad
+    interactive-html-bom
   ];
 }