Update Nixpkgs

Updates the nixpkgs flake input to the latest version from the nixos-unstable branch.

Workflow

When the user requests to update nixpkgs:

1. •

   Update the nixpkgs flake input

   bash

   nix flake update nixpkgs
   

   This command:

   • •Fetches the latest commit from github:nixos/nixpkgs/nixos-unstable
   • •Updates the flake.lock file with the new revision and hash
   • •Preserves all other flake inputs unchanged
2. •

   Verify the changes

   bash

   nix flake check
   

   Or build without applying:

   bash

   nix build .#homeConfigurations.company-mbp.activationPackage
   

   This verifies the flake is valid and all packages build correctly without activating the configuration.

3. •

   Show what changed

   bash

   git diff flake.lock
   

   Review the nixpkgs revision change to confirm the update.

Package Details

The flake.nix contains:

• •nixpkgs: Main package repository (github:nixos/nixpkgs/nixos-unstable)
• •Used by home-manager and all package definitions
• •Updates bring in latest package versions and security fixes

Prerequisites

• •Nix with flakes enabled
• •Write access to the flake.lock file
• •Internet connection to fetch latest nixpkgs

Example Usage

User: "Update nixpkgs to the latest version"

Response workflow:

1. •Navigate to the home-manager config directory
2. •Run nix flake update nixpkgs
3. •Verify with nix flake check or nix build
4. •Show the user what revision was updated to
5. •Do NOT apply automatically