Create flake.nix

flake.lock

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+{
+  "nodes": {
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1756579987,
+        "narHash": "sha256-duCce8zGsaMsrqqOmLOsuaV1PVIw/vXWnKuLKZClsGg=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "99a69bdf8a3c6bf038c4121e9c4b6e99706a187a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1756542300,
+        "narHash": "sha256-tlOn88coG5fzdyqz6R93SQL5Gpq+m/DsWpekNFhqPQk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d7600c775f877cd87b4f5a831c28aa94137377aa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "Home Manager configuration of j";
+
+  inputs = {
+    # Specify the source of Home Manager and Nixpkgs.
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    { nixpkgs, home-manager, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in
+    {
+      # TCS config
+      homeConfigurations."j@lenny" = home-manager.lib.homeManagerConfiguration {
+        inherit pkgs;
+
+        # Specify your home configuration modules here, for example,
+        # the path to your home.nix.
+        modules = [
+		./home-manager/common.nix
+		./home-manager/lenny.nix
+	];
+
+        # Optionally use extraSpecialArgs
+        # to pass through arguments to home.nix
+      };
+
+      # Home
+      homeConfigurations."j" = home-manager.lib.homeManagerConfiguration {
+        inherit pkgs;
+
+        # Specify your home configuration modules here, for example,
+        # the path to your home.nix.
+        modules = [
+		./home-manager/common.nix
+	];
+      };
+    };
+}

home-manager/common.nix

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+{ config, pkgs, ... }:
+
+{
+  # Home Manager needs a bit of information about you and the paths it should
+  # manage.
+  home.username = "j";
+  home.homeDirectory = "/home/j";
+
+  # This value determines the Home Manager release that your configuration is
+  # compatible with. This helps avoid breakage when a new Home Manager release
+  # introduces backwards incompatible changes.
+  #
+  # You should not change this value, even if you update Home Manager. If you do
+  # want to update the value, then make sure to first check the Home Manager
+  # release notes.
+  home.stateVersion = "25.05"; # Please read the comment before changing.
+
+  # The home.packages option allows you to install Nix packages into your
+  # environment.
+  home.packages = with pkgs; [
+    # Desktop
+    pavucontrol
+    wofi
+    waybar
+
+    pkgs.nerd-fonts.fira-code
+    pkgs.nerd-fonts.monoid
+
+    wezterm
+
+    # Editors
+    emacs
+    neovim
+    helix
+
+    # Utils
+    jq
+    bat # less alternative
+    eza # Better ld
+    zoxide # better cd
+    yazi # File manager
+
+    # Shells
+    fish
+    grc # Colorizer
+    fishPlugins.grc
+    starship
+
+    # Dev tools
+    git
+
+    #uutils-coreutils
+
+    # # It is sometimes useful to fine-tune packages, for example, by applying
+    # # overrides. You can do that directly here, just don't forget the
+    # # parentheses. Maybe you want to install Nerd Fonts with a limited number of
+    # # fonts?
+    # (pkgs.nerdfonts.override { fonts = [ "FantasqueSansMono" ]; })
+
+    # # You can also create simple shell scripts directly inside your
+    # # configuration. For example, this adds a command 'my-hello' to your
+    # # environment:
+    # (pkgs.writeShellScriptBin "my-hello" ''
+    #   echo "Hello, ${config.home.username}!"
+    # '')
+  ];
+
+  # Home Manager is pretty good at managing dotfiles. The primary way to manage
+  # plain files is through 'home.file'.
+  home.file = {
+    # # Building this configuration will create a copy of 'dotfiles/screenrc' in
+    # # the Nix store. Activating the configuration will then make '~/.screenrc' a
+    # # symlink to the Nix store copy.
+    # ".screenrc".source = dotfiles/screenrc;
+
+    # # You can also set the file content immediately.
+    # ".gradle/gradle.properties".text = ''
+    #   org.gradle.console=verbose
+    #   org.gradle.daemon.idletimeout=3600000
+    # '';
+  };
+
+  # Home Manager can also manage your environment variables through
+  # 'home.sessionVariables'. These will be explicitly sourced when using a
+  # shell provided by Home Manager. If you don't want to manage your shell
+  # through Home Manager then you have to manually source 'hm-session-vars.sh'
+  # located at either
+  #
+  #  ~/.nix-profile/etc/profile.d/hm-session-vars.sh
+  #
+  # or
+  #
+  #  ~/.local/state/nix/profiles/profile/etc/profile.d/hm-session-vars.sh
+  #
+  # or
+  #
+  #  /etc/profiles/per-user/j/etc/profile.d/hm-session-vars.sh
+  #
+  home.sessionVariables = {
+    # EDITOR = "emacs";
+    EDITOR = "nvim";
+  };
+
+  # Let Home Manager install and manage itself.
+  programs.home-manager.enable = true;
+
+  programs.eza = {
+  	enableFishIntegration = true;
+	icons = "auto";
+	git = true;
+	extraOptions = [
+		"--color=always"
+		"--tree"
+		"--level=1"
+		"--group-directories=first"
+		"--dereference"
+	];
+  };
+
+  programs.fish = {
+      enable = true;
+      interactiveShellInit = ''set fish_greeting '';
+      plugins = [
+        { name = "grc"; src = pkgs.fishPlugins.grc.src; }
+      ];
+  };
+
+  programs.starship = {
+    enable = true;
+    settings = {
+	    add_newline = false;
+    };
+  };
+
+  programs.zoxide.enable = true;
+  programs.bash = {
+    enable = true;
+    initExtra = ''
+      if [[ $(${pkgs.procps}/bin/ps --no-header --pid=$PPID --format=comm) != "fish" && -z ''${BASH_EXECUTION_STRING} ]]
+      then
+        shopt -q login_shell && LOGIN_OPTION='--login' || LOGIN_OPTION=""
+        exec ${pkgs.fish}/bin/fish $LOGIN_OPTION
+      fi
+    ''; # Launch fish on startup
+  };
+
+  fonts.fontconfig.enable = true;
+
+
+
+}

home-manager/lenny.nix

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+{ config, pkgs, ... }:
+{
+  home.packages = with pkgs; [
+  	jujutsu
+  ];
+  programs.git = {
+      enable = true;
+      userName = "Fernando Sánchez";
+      userEmail = "f.sanchez@thechannelstore.tv";
+      extraConfig = {
+              init.defaultBranch = "main";
+      };
+  };
+
+}

home-manager/personal.nix

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+{ config, pkgs, ... }:
+{
+  home.packages = with pkgs; [ ];
+  programs.git = {
+      enable = true;
+      userName = "J. Fernando Sánchez";
+      userEmail = "balkian@gmail.com";
+      extraConfig = {
+              init.defaultBranch = "main";
+      };
+  };
+
+}