my-nixpkgs

Use in configuration.nix

nixpkgs.overlays = [
  (import (builtins.fetchGit {
    url = "https://git.htns.se/kalaset/my-nixpkgs.git";
    rev = "revision";
  })).overlays
];

Test a specific package

nix-build -E "(import <nixpkgs> {overlays = [(import ./overlays.nix)];}).pkgs.packagename"

nix-build -E "(import <nixpkgs> {}).callPackage ./pkgs/packagename {}"
nix-build -E "(import <nixpkgs> {overlays = [(import ./overlays.nix)];}).callPackage ./pkgs/packagename {}"