tools: update nixpkgs-unstable to c6d65881c5624c9cae5ea6cedef24699b0c

Author: nodejs-github-bot

tools/nix/pkgs.nix

@@ -1,10 +1,10 @@
 arg:
 let
   repo = "https://github.com/NixOS/nixpkgs";
-  rev = "01fbdeef22b76df85ea168fbfe1bfd9e63681b30";
+  rev = "c6d65881c5624c9cae5ea6cedef24699b0c0a4c0";
   nixpkgs = import (builtins.fetchTarball {
     url = "${repo}/archive/${rev}.tar.gz";
-    sha256 = "0b76m4i1sn0dg78ylapvbkgw9knkf6lm1lss39w6zyshgv1rbi0q";
+    sha256 = "1yf4qv3scjygdkg67nibrhbddg3154mv9cxffvykmwcrwfcrrlaq";
   }) arg;
 in
 nixpkgs