Pin hosts on urithiru for less building

flake.lock

@@ -53,11 +53,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1618967915,
+        "lastModified": 1619060385,
-        "narHash": "sha256-+BYz6ihIzBDcXFTrPxBibQX0PYXjK42JX5XA6SFMxiI=",
+        "narHash": "sha256-4y/QSlmyIsMYP+g1mnZaBUTDED07wHPhtBdCjEnk0/A=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "5bc2962319ca6ccbd0033c95d3e00c9fde1b67ff",
+        "rev": "f2a3a0edab77d4c5cf67436912970e85a5c77b19",
         "type": "github"
       },
       "original": {

flake.nix

@@ -30,6 +30,7 @@
         home-manager.nixosModules.home-manager
         ./modules
       ];
+      extraArgs = { nixosConfigurations = self.nixosConfigurations; };
     };
     hosts = {
       kharbranth.modules = [ ./machines/kharbranth ];

machines/urithiru/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ lib, pkgs, nixosConfigurations, ... }:
 
 {
   imports = [
@@ -11,6 +11,9 @@
 
   networking.hostId = "079e60ba";
 
+  environment.etc = lib.mapAttrs' (n: v: { name = "pinned-hosts/${n}"; value = { source = v.config.system.build.toplevel.outPath; }; })
+    (lib.filterAttrs (n: _: n != "urithiru") nixosConfigurations);
+
   chvp = {
     stateVersion = "20.09";
     accentor.enable = true;