[Miso] Adds Miso cache to Vega

system/hosts/vega/cachix.nix

@@ -0,0 +1,13 @@
+# WARN: `cachix use` will write to /etc/nixos/.  You will need to update this file manually.
+{ lib, ... }:
+
+let
+  folder = ./cachix;
+  toImport = name: value: folder + ("/" + name);
+  filterCaches = key: value: value == "regular" && lib.hasSuffix ".nix" key;
+  imports = lib.mapAttrsToList toImport (lib.filterAttrs filterCaches (builtins.readDir folder));
+in
+{
+  inherit imports;
+  nix.settings.substituters = [ "https://cache.nixos.org/" ];
+}

system/hosts/vega/cachix/haskell-miso-cachix.nix

@@ -0,0 +1,13 @@
+
+{
+  nix = {
+    settings = {
+      substituters = [
+        "https://haskell-miso-cachix.cachix.org"
+      ];
+      trusted-public-keys = [
+        "haskell-miso-cachix.cachix.org-1:m8hN1cvFMJtYib4tj+06xkKt5ABMSGfe8W7s40x1kQ0="
+      ];
+    };
+  };
+}

system/hosts/vega/configuration.nix

@@ -64,6 +64,7 @@
   # $ nix search wget
   environment.systemPackages = with pkgs; [
     vim
+    cachix
   ];
 
   # Some programs need SUID wrappers, can be configured further or are

system/hosts/vega/default.nix

@@ -1,6 +1,7 @@
 { ... }:
 {
   imports = [
+    ./cachix.nix
     ./configuration.nix
     ./hardware-configuration.nix
     ../../authorized-keys.nix