l mors.r: use unstable

lass/1systems/mors/source.nix

@@ -0,0 +1,21 @@
+{ lib, pkgs, test, ... }: let
+  npkgs = lib.importJSON ../../../krebs/nixpkgs-unstable.json;
+in {
+  nixpkgs = (if test then lib.mkForce ({ derivation = let
+    rev = npkgs.rev;
+    sha256 = npkgs.sha256;
+  in ''
+    with import (builtins.fetchTarball {
+      url = "https://github.com/nixos/nixpkgs/archive/${rev}.tar.gz";
+      sha256 = "${sha256}";
+    }) {};
+    pkgs.fetchFromGitHub {
+      owner = "nixos";
+      repo = "nixpkgs";
+      rev = "${rev}";
+      sha256 = "${sha256}";
+    }
+  ''; }) else {
+    git.ref = lib.mkForce npkgs.rev;
+  });
+}