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Install packages, bundlers, and libs from this repository using either direct flake installation or the Nix User Repository (NUR).
Configure the binary cache to avoid building packages from source.

​
Direct Flake Installation

Add the flake as an input to your flake.nix and use overlays to access packages and libs.
1

Add to flake inputs

Add the repository to your flake inputs with nixpkgs and systems following:
flake.nix
{
  inputs = {
    systems.url = "github:nix-systems/default";
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    trev = {
      url = "github:spotdemo4/nur";
      inputs.systems.follows = "systems";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
}
Using follows ensures you don’t duplicate nixpkgs and systems in your flake lock.
2

Import overlays

Import nixpkgs with the overlays to access packages and libs:
flake.nix
outputs = { nixpkgs, trev, ... }:
  trev.libs.mkFlake (system:
    let
      pkgs = import nixpkgs {
        inherit system;
        overlays = [
          trev.overlays.packages
          trev.overlays.libs
        ];
      };
    in
    rec {
      # Your flake outputs here
    }
  );
  • packages - Adds all packages directly to pkgs namespace
  • libs - Adds utility functions to pkgs.lib
  • images - Adds Docker images to pkgs.image
  • pythonPackages - Adds Python packages to Python package sets
  • default - Adds all packages under pkgs.trev namespace
3

Use packages in dev shells

Access packages through the pkgs namespace:
flake.nix
devShells = {
  default = pkgs.mkShell {
    packages = with pkgs; [
      nixfmt
      prettier
      bobgen        # From trev.overlays.packages
      opengrep      # From trev.overlays.packages
    ];
    shellHook = pkgs.shellhook.ref;
  };
};
4

Add to NixOS system packages

For NixOS configurations, import the overlay module:
flake.nix
nixosConfigurations = {
  laptop = nixpkgs.lib.nixosSystem {
    modules = [
      trev.nixosModules.overlay  # Adds the default overlay

      ({ pkgs, ... }: {
        environment.systemPackages = [
          pkgs.trev.bobgen
          pkgs.trev.renovate
          pkgs.trev.opengrep
        ];
      })
    ];
  };
};

​
Complete Example

{
  nixConfig = {
    extra-substituters = [ "https://nix.trev.zip" ];
    extra-trusted-public-keys = [ "trev:I39N/EsnHkvfmsbx8RUW+ia5dOzojTQNCTzKYij1chU=" ];
  };

  inputs = {
    systems.url = "github:nix-systems/default";
    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
    trev = {
      url = "github:spotdemo4/nur";
      inputs.systems.follows = "systems";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { nixpkgs, trev, ... }:
    trev.libs.mkFlake (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [
            trev.overlays.packages
            trev.overlays.libs
          ];
        };
      in
      rec {
        devShells = {
          default = pkgs.mkShell {
            packages = with pkgs; [
              nixfmt
              prettier
            ];
            shellHook = pkgs.shellhook.ref;
          };
        };

        checks = pkgs.lib.mkChecks {
          nix = {
            src = ./.;
            deps = with pkgs; [ nixfmt-tree ];
            script = ''
              treefmt --ci
            '';
          };
        };
      }
    );
}

​
Nix User Repository (NUR)

Install packages through the Nix User Repository as an alternative to direct flake installation.
1

Add NUR to inputs

Add the NUR flake to your inputs:
flake.nix
{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    nur = {
      url = "github:nix-community/NUR";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
}
2

Import NUR module

Add the NUR module to your NixOS configuration:
flake.nix
outputs = { self, nixpkgs, nur }: {
  nixosConfigurations = {
    laptop = nixpkgs.lib.nixosSystem {
      modules = [
        nur.modules.nixos.default  # Adds NUR overlay

        ({ pkgs, ... }: {
          environment.systemPackages = [
            pkgs.nur.repos.trev.bobgen
            pkgs.nur.repos.trev.renovate
          ];
        })
      ];
    };
  };
};

​
Complete Example

flake.nix
{
  nixConfig = {
    extra-substituters = [ "https://nix.trev.zip" ];
    extra-trusted-public-keys = [ "trev:I39N/EsnHkvfmsbx8RUW+ia5dOzojTQNCTzKYij1chU=" ];
  };

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    nur = {
      url = "github:nix-community/NUR";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { self, nixpkgs, nur }: {
    nixosConfigurations = {
      laptop = nixpkgs.lib.nixosSystem {
        modules = [
          nur.modules.nixos.default

          ({ pkgs, ... }: {
            environment.systemPackages = [
              pkgs.nur.repos.trev.bobgen
            ];
          })
        ];
      };
    };
  };
}
Don’t forget to configure the binary cache to avoid building packages from source.

​
Quick Start Commands

Run packages directly without installation: 
# Run bobgen
nix run github:spotdemo4/nur#bobgen

# Run renovate
nix run github:spotdemo4/nur#renovate

# Run opengrep
nix run github:spotdemo4/nur#opengrep
Bundle packages for distribution: 
# Build Docker image
nix bundle --bundler github:spotdemo4/nur#docker

# Cross-compile Go package for Linux
nix bundle --bundler github:spotdemo4/nur#go-x86_64-linux

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