tools: update nixpkgs-unstable to 7d853e518814cca2a657b72eeba67ae20eb

Author: nodejs-github-bot

tools/nix/pkgs.nix

@@ -1,10 +1,10 @@
 arg:
 let
   repo = "https://github.com/NixOS/nixpkgs";
-  rev = "f997fa0f94fb1ce55bccb97f60d41412ae8fde4c";
+  rev = "7d853e518814cca2a657b72eeba67ae20ebf7059";
   nixpkgs = import (builtins.fetchTarball {
     url = "${repo}/archive/${rev}.tar.gz";
-    sha256 = "16x3n08n0ffqn8m2h73vk2wr0ssa8lsfvq2yc1gfd59gsss47n3m";
+    sha256 = "0hsqizh6kqp27gywdl33rpjclz8lls8s757qwa5qkbjb9an0dxlp";
   }) arg;
 in
 nixpkgs