Add hack for working VM on nixos-21.11

modules/build.nix

@@ -1,15 +1,16 @@
-{ lib, extendModules, modulesPath, options, config, ... }:
+{ lib, extendModules, modulesPath, baseModules, options, config, ... }:
   let
     inherit (lib) mkOption;
     inherit (lib.my) mkBoolOpt;
 
     cfg = config.my.build;
 
-    # TODO: This is broken on 21.11 (https://github.com/NixOS/nixpkgs/issues/148343)
     asDevVM = extendModules {
+      # TODO: Hack because this is kinda broken on 21.11 (https://github.com/NixOS/nixpkgs/issues/148343)
+      specialArgs = { inherit baseModules; };
       modules = [
-        (import "${modulesPath}/virtualisation/qemu-vm.nix")
-        ({ config, ... }: {
+        "${modulesPath}/virtualisation/qemu-vm.nix"
+        ({ ... }: {
           my.boot.isDevVM = true;
         })
       ];

systems.nix

@@ -9,8 +9,19 @@
       config,
     }:
       let
-        lib = pkgsFlakes.${nixpkgs}.lib;
-      in lib.nixosSystem {
+        pkgsFlake = pkgsFlakes.${nixpkgs};
+        lib = pkgsFlake.lib;
+        # TODO: This is mostly yoinked from nixpkgs/flake.nix master (as of 2022/02/11) since 21.11's version has hacky
+        # vm build stuff that breaks our impl. REMOVE WHEN 22.05 IS OUT!
+        nixosSystem' = args:
+          import "${pkgsFlake}/nixos/lib/eval-config.nix" (args // {
+            modules = args.modules ++ [ {
+              system.nixos.versionSuffix =
+                ".${lib.substring 0 8 pkgsFlake.lastModifiedDate}.${pkgsFlake.shortRev}";
+              system.nixos.revision = pkgsFlake.rev;
+            } ];
+          });
+      in nixosSystem' {
         inherit lib system;
         specialArgs = { inherit inputs system; };
         modules = attrValues modules ++ [ { networking.hostName = mkDefault name; } config ];
@@ -18,7 +29,7 @@
   in mapAttrs mkSystem {
     colony = {
       system = "x86_64-linux";
-      nixpkgs = "unstable";
+      nixpkgs = "stable";
       config = boxes/colony.nix;
     };
   }