diff --git a/README.md b/README.md
index 3c1e24d..c807c31 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,32 @@ Safety notes:
 - Installer creates timestamped backups before replacing files.
 - `boo uninstall` can restore your previous Ghostty config when a backup exists.
 
+## Install with Nix
+
+```bash
+nix profile install github:Ansub/boo
+boo doctor fix
+```
+
+Or as a flake input in your config:
+
+```nix
+# flake.nix
+inputs.boo.url = "github:Ansub/boo";
+```
+
+```nix
+# Add boo to packages
+environment.systemPackages = [ inputs.boo.packages.${system}.default ];
+
+# Source shell integration (home-manager)
+programs.zsh.initExtra = ''
+  source "${inputs.boo.packages.${system}.default}/shell/boo.zsh"
+'';
+```
+
+Run `boo doctor fix` once after install to bootstrap `~/.config/boo/`.
+
 ## Verify It Worked
 
 ```bash
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..c375b0c
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1773476965,
+        "narHash": "sha256-Laaj25PvGeoP5SPhMfMGxvWqM6ZjZ6LdUeEhP6b3czY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f82ce7af0b79ac154b12e27ed800aeb97413723c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..f58af66
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,22 @@
+{
+  description = "Boo — a CLI for managing Ghostty + Zsh terminal themes";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        boo = pkgs.callPackage ./package.nix { };
+      in
+      {
+        packages = {
+          default = boo;
+          boo = boo;
+        };
+      }
+    );
+}
diff --git a/package.nix b/package.nix
new file mode 100644
index 0000000..615219f
--- /dev/null
+++ b/package.nix
@@ -0,0 +1,43 @@
+{ lib, stdenvNoCC, makeWrapper, bash, coreutils, gnused, gnugrep, gawk, findutils }:
+
+stdenvNoCC.mkDerivation {
+  pname = "boo";
+  version = "0-unstable";
+
+  src = lib.fileset.toSource {
+    root = ./.;
+    fileset = lib.fileset.unions [
+      ./bin
+      ./art
+      ./themes
+      ./shell
+      ./configs
+      ./scripts
+    ];
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  installPhase = ''
+    runHook preInstall
+
+    # Preserve repo layout at $out so bin/boo's fallback paths
+    # (../themes, ../art, ../shell, ../configs) resolve correctly
+    mkdir -p $out/bin
+    cp -r art themes shell configs scripts $out/
+
+    install -Dm755 bin/boo $out/bin/boo
+    wrapProgram $out/bin/boo \
+      --prefix PATH : ${lib.makeBinPath [ bash coreutils gnused gnugrep gawk findutils ]}
+
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "CLI for managing Ghostty + Zsh terminal themes, fonts, and splash art";
+    homepage = "https://github.com/Ansub/boo";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.unix;
+    mainProgram = "boo";
+  };
+}