Use kicad from nixos-unstable-small

flake.lock

@@ -37,6 +37,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1638873506,
+        "narHash": "sha256-BCZS7lDqQKgKbkTbmMtV8DI4MQDTCelbCI4f2FPjzAc=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "ebb7f07eec7dc57fc14acdc0b8206b4d4fe1da07",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable-small",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "private": {
       "locked": {
         "lastModified": 1637382407,
@@ -57,6 +73,7 @@
       "inputs": {
         "home-manager": "home-manager",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-unstable": "nixpkgs-unstable",
         "private": "private",
         "rustybar": "rustybar",
         "wip-pinebook-pro": "wip-pinebook-pro"

flake.nix

@@ -1,6 +1,7 @@
 {
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-21.11";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable-small";
 
     home-manager = {
       url = "github:nix-community/home-manager/release-21.11";
@@ -20,12 +21,13 @@
     };
   };
 
-  outputs = { self, nixpkgs, home-manager, rustybar, private, wip-pinebook-pro, ... } @ inputs:
+  outputs = { self, nixpkgs, home-manager, rustybar, private, wip-pinebook-pro, nixpkgs-unstable, ... } @ inputs:
     let
       makeSystem = conf: nixpkgs.lib.nixosSystem (nixpkgs.lib.recursiveUpdate conf
         rec {
           specialArgs = {
             inherit inputs;
+            pkgs-unstable = nixpkgs-unstable.legacyPackages."${conf.system}";
           };
           modules = [
             private.nixosModules.base

sets/hardware.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, pkgs, pkgs-unstable, ... }:
 let
   jlink = pkgs.callPackage ../externals/packages/jlink { };
 in
@@ -12,7 +12,7 @@ in
   ];
 
   environment.systemPackages = with pkgs; [
-    kicad-unstable
+    pkgs-unstable.kicad-unstable
     openocd
     picocom
     stlink