nixos-config/nix/sources.json

{
    "home-manager": {
        "branch": "release-24.11",
        "description": "Manage a user environment using Nix  [maintainer=@rycee] ",
        "homepage": "https://nix-community.github.io/home-manager/",
        "owner": "nix-community",
        "repo": "home-manager",
        "rev": "aecd341dfead1c3ef7a3c15468ecd71e8343b7c6",
        "sha256": "1a4waars8izbr1xcwvljyhr85h2f2pr0qfq0b994q1cgij816rhn",
        "type": "tarball",
        "url": "https://github.com/nix-community/home-manager/archive/aecd341dfead1c3ef7a3c15468ecd71e8343b7c6.tar.gz",
        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
    },
    "niv": {
        "branch": "master",
        "description": "Easy dependency management for Nix projects",
        "homepage": "https://github.com/nmattia/niv",
        "owner": "nmattia",
        "repo": "niv",
        "rev": "55422d6f2618cd2195eeafa3f16ae63fde723c15",
        "sha256": "1s6m41hhsydf3lw6ihksc904vcpyd5agwiqq8hb8plyqvsyn74ba",
        "type": "tarball",
        "url": "https://github.com/nmattia/niv/archive/55422d6f2618cd2195eeafa3f16ae63fde723c15.tar.gz",
        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
    }
}