ci: fix purity (#42)

.github/workflows/nix.yml

@@ -7,8 +7,6 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: cachix/install-nix-action@v12
-      with:
-        nix_path: nixpkgs=channel:nixos-unstable
     - uses: cachix/cachix-action@v8
       with:
         name: nix-community

build01/cache.nix

@@ -20,7 +20,7 @@ in {
 
   nixpkgs.overlays = [
     (self: super: {
-      queued-build-hook = (import sources.queued-build-hook {});
+      queued-build-hook = (import sources.queued-build-hook { pkgs = super; });
     })
   ];
 

build01/hardware-configuration.nix

@@ -1,10 +1,10 @@
 # Do not modify this file!  It was generated by ‘nixos-generate-config’
 # and may be overwritten by future invocations.  Please make changes
 # to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, modulesPath, ... }:
 
 {
-  imports = [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix> ];
+  imports = [ "${modulesPath}/installer/scan/not-detected.nix" ];
 
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "sd_mod" ];
   boot.kernelModules = [ "kvm-amd" ];