diff --git a/nix-shared/overlays/default.nix b/nix-shared/overlays/default.nix
index bdc41bd0..87989b25 100644
--- a/nix-shared/overlays/default.nix
+++ b/nix-shared/overlays/default.nix
@@ -323,7 +323,6 @@ from transformers import (/' \
       '';
     });
 
-  happy-coder = final.callPackage ../../nixos/packages/happy-coder { };
   playwright-cli = final.callPackage ../../nixos/packages/playwright-cli { };
   t3code = final.callPackage ../../nixos/packages/t3code { };
   # Custom Waybar fork for workspace taskbar support + external SNI watcher option.
diff --git a/nixos/code.nix b/nixos/code.nix
index 56b4b6af..66f5e544 100644
--- a/nixos/code.nix
+++ b/nixos/code.nix
@@ -69,7 +69,6 @@ makeEnable config "myModules.code" true {
       claude-code
       codex
       gemini-cli
-      happy-coder
       opencode
       t3code
 
diff --git a/nixos/packages/happy-coder/default.nix b/nixos/packages/happy-coder/default.nix
deleted file mode 100644
index 661cbd46..00000000
--- a/nixos/packages/happy-coder/default.nix
+++ /dev/null
@@ -1,115 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  fetchYarnDeps,
-  yarnConfigHook,
-  nodejs,
-  makeWrapper,
-}:
-stdenv.mkDerivation (
-  finalAttrs: let
-    toolArchiveSuffix =
-      if stdenv.hostPlatform.isLinux
-      then
-        if stdenv.hostPlatform.isAarch64
-        then "arm64-linux"
-        else if stdenv.hostPlatform.isx86_64
-        then "x64-linux"
-        else throw "Unsupported Linux architecture for happy-coder: ${stdenv.hostPlatform.system}"
-      else if stdenv.hostPlatform.isDarwin
-      then
-        if stdenv.hostPlatform.isAarch64
-        then "arm64-darwin"
-        else if stdenv.hostPlatform.isx86_64
-        then "x64-darwin"
-        else throw "Unsupported Darwin architecture for happy-coder: ${stdenv.hostPlatform.system}"
-      else throw "Unsupported platform for happy-coder: ${stdenv.hostPlatform.system}";
-  in {
-    pname = "happy-coder";
-    version = "0.11.2-unstable-2026-03-26";
-
-    src = fetchFromGitHub {
-      owner = "slopus";
-      repo = "happy";
-      rev = "94a6bdc7b41e96b878a5ca0f8a2becdfe5a7f219";
-      hash = "sha256-kcZq8raSM111wb58Uk3cyhQ5MrwtwV8zUQx+2f6kPXA=";
-    };
-
-    yarnOfflineCache = fetchYarnDeps {
-      yarnLock = finalAttrs.src + "/yarn.lock";
-      hash = "sha256-VjxmoOVKdOtyRAx0zVgdmLWiXzeqHVbgAXc7D3GFbc8=";
-    };
-
-    nativeBuildInputs = [
-      nodejs
-      yarnConfigHook
-      makeWrapper
-    ];
-
-    # Fix a type mismatch in upstream TS sources.
-    postPatch = ''
-      substituteInPlace packages/happy-cli/src/agent/acp/runAcp.ts \
-        --replace-fail 'formatOptionalDetail(mode.description,' \
-                       'formatOptionalDetail(mode.description ?? undefined,'
-    '';
-
-    buildPhase = ''
-      runHook preBuild
-
-      yarn --offline workspace @slopus/happy-wire build
-      yarn --offline workspace happy build
-
-      runHook postBuild
-    '';
-
-    installPhase = ''
-      runHook preInstall
-
-      local packageOut="$out/lib/node_modules/happy-coder"
-      mkdir -p "$packageOut"
-      mkdir -p "$out/bin"
-
-      cp -r packages/happy-cli/dist "$packageOut/dist"
-      cp -r packages/happy-cli/bin "$packageOut/bin"
-      cp -r packages/happy-cli/scripts "$packageOut/scripts"
-      cp packages/happy-cli/package.json "$packageOut/package.json"
-
-      mkdir -p "$packageOut/tools/archives" "$packageOut/tools/licenses"
-      cp -r packages/happy-cli/tools/licenses/. "$packageOut/tools/licenses/"
-      cp packages/happy-cli/tools/archives/difftastic-${toolArchiveSuffix}.tar.gz \
-        "$packageOut/tools/archives/"
-      cp packages/happy-cli/tools/archives/ripgrep-${toolArchiveSuffix}.tar.gz \
-        "$packageOut/tools/archives/"
-
-      find node_modules -mindepth 1 -maxdepth 2 -type l -delete
-      cp -r node_modules "$packageOut/node_modules"
-
-      if [ -d packages/happy-cli/node_modules ]; then
-        find packages/happy-cli/node_modules -mindepth 1 -maxdepth 2 -type l -delete
-        cp -rn packages/happy-cli/node_modules/. "$packageOut/node_modules/"
-      fi
-
-      mkdir -p "$packageOut/node_modules/@slopus/happy-wire"
-      cp -r packages/happy-wire/dist "$packageOut/node_modules/@slopus/happy-wire/dist"
-      cp packages/happy-wire/package.json "$packageOut/node_modules/@slopus/happy-wire/package.json"
-
-      find "$packageOut/node_modules" -xtype l -delete
-
-      for bin in happy happy-mcp; do
-        makeWrapper ${nodejs}/bin/node "$out/bin/$bin" \
-          --add-flags "$packageOut/bin/$bin.mjs"
-      done
-
-      runHook postInstall
-    '';
-
-    meta = {
-      description = "Mobile and web client wrapper for Claude Code and Codex with end-to-end encryption";
-      homepage = "https://github.com/slopus/happy";
-      license = lib.licenses.mit;
-      maintainers = with lib.maintainers; [onsails];
-      mainProgram = "happy";
-    };
-  }
-)