build(nix): switch to profianinc/nixpkgs

Signed-off-by: Roman Volosatovs <roman@profian.com>

Author: Roman Volosatovs

flake.lock

@@ -6,7 +6,7 @@
   inputs.flake-compat.flake = false;
   inputs.flake-compat.url = github:edolstra/flake-compat;
   inputs.flake-utils.url = github:numtide/flake-utils;
-  inputs.nixpkgs.url = github:NixOS/nixpkgs;
+  inputs.nixpkgs.url = github:profianinc/nixpkgs;
   inputs.rust-overlay.inputs.flake-utils.follows = "flake-utils";
   inputs.rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
   inputs.rust-overlay.url = github:oxalica/rust-overlay;