diff --git a/nixos/essential.nix b/nixos/essential.nix
index a3a8a51f..cfb84cb5 100644
--- a/nixos/essential.nix
+++ b/nixos/essential.nix
@@ -5,6 +5,7 @@
   ...
 }: let
   git-blame-rank = inputs.git-blame-rank.packages.${pkgs.stdenv.hostPlatform.system}.default;
+  coqui-tts-streamer = inputs.coqui-tts-streamer.packages.${pkgs.stdenv.hostPlatform.system}.default;
   keepbook = inputs.keepbook.packages.${pkgs.stdenv.hostPlatform.system}.keepbook.overrideAttrs (_: {
     # Upstream checks currently depend on TS artifacts that are not built in Nix.
     doCheck = false;
@@ -19,6 +20,8 @@
     cachix
     bubblewrap
     cmake
+    coqui-tts-streamer
+    dex
     direnv
     fd
     ffmpeg
diff --git a/nixos/flake.lock b/nixos/flake.lock
index a4d0e145..4d2a601f 100644
--- a/nixos/flake.lock
+++ b/nixos/flake.lock
@@ -186,6 +186,33 @@
         "type": "github"
       }
     },
+    "coqui-tts-streamer": {
+      "inputs": {
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-overlay": [
+          "git-sync-rs",
+          "rust-overlay"
+        ]
+      },
+      "locked": {
+        "lastModified": 1776281033,
+        "narHash": "sha256-Loz5kJHCM8Q04suAZ8683LdW7AP1kn4EszZe1ZjXqGM=",
+        "owner": "colonelpanic8",
+        "repo": "coqui-tts-streamer",
+        "rev": "5b522e3c96db61e2232c917f2c6e3f2570f98a47",
+        "type": "github"
+      },
+      "original": {
+        "owner": "colonelpanic8",
+        "repo": "coqui-tts-streamer",
+        "type": "github"
+      }
+    },
     "darwin": {
       "inputs": {
         "nixpkgs": [
@@ -2069,6 +2096,7 @@
         "caelestia-shell": "caelestia-shell",
         "claude-code-nix": "claude-code-nix",
         "codex-cli-nix": "codex-cli-nix",
+        "coqui-tts-streamer": "coqui-tts-streamer",
         "flake-utils": "flake-utils",
         "git-blame-rank": "git-blame-rank",
         "git-ignore-nix": "git-ignore-nix",
diff --git a/nixos/flake.nix b/nixos/flake.nix
index 475ada8e..798ae0d9 100644
--- a/nixos/flake.nix
+++ b/nixos/flake.nix
@@ -72,6 +72,17 @@
       };
     };
 
+    coqui-tts-streamer = {
+      # Keep the default install reproducible across machines.
+      # For local development, use `just switch --override-input coqui-tts-streamer path:/home/imalison/Projects/coqui-tts-streamer`.
+      url = "github:colonelpanic8/coqui-tts-streamer";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        flake-utils.follows = "flake-utils";
+        rust-overlay.follows = "git-sync-rs/rust-overlay";
+      };
+    };
+
     kanshi-sni = {
       url = "github:taffybar/kanshi-sni";
       inputs = {