Squash merge dev into master

hosts/cachix.nix

@@ -0,0 +1,13 @@
+
+# WARN: this file will get overwritten by $ cachix use <name>
+{ pkgs, 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/"];
+}

hosts/cachix/cobray.nix

@@ -0,0 +1,13 @@
+
+{
+  nix = {
+    settings = {
+      substituters = [
+        "https://cobray.cachix.org"
+      ];
+      trusted-public-keys = [
+        "cobray.cachix.org-1:6ZmcK5aWb30lKS4VkEkPV2YkMv8yXYu5eQjY9D6r8kk="
+      ];
+    };
+  };
+}

hosts/configuration.nix

@@ -7,6 +7,7 @@
     ./hardware-configuration.nix
     ./system-packages.nix
     ../modules/default.nix
+    ./cachix.nix
   ];
 
   nix.gc = {