diff --git a/nixos/flake.nix b/nixos/flake.nix
index 85960abc..9ea98f44 100644
--- a/nixos/flake.nix
+++ b/nixos/flake.nix
@@ -225,31 +225,7 @@
     ...
   }: let
     # Nixpkgs PR patches - just specify PR number and hash
-    nixpkgsPRPatches = [
-      # playwright-cli
-      {
-        pr = 490230;
-        hash = "sha256-vQM2mmIgpxFo3ctjk2tXkfhocXnTuHSEy8iYkTexScc=";
-      }
-      # t3code base PR
-      {
-        pr = 497465;
-        hash = "sha256-pFofbc6noAqAq6vF+uxvdAk8cV5lftAREWPJGXue/cg=";
-      }
-      {
-        pr = 492656;
-        hash = "sha256-0TGZ12iIfSYs6cs5kgWDAyiThJdlLMhqRGUscVQv5hU=";
-      }
-      # claude-code
-      # {
-      #   pr = 464698;
-      #   hash = "sha256-Pe9G6b/rI0874mM7FIOSEKiaubk95NcFhTQ7paAeLTU=";
-      # }
-      # {
-      #   pr = 464816;
-      #   hash = "sha256-bKEoRy4dzP5TyRBjYskwEzr7tj8/ez/Y1XHiQgu5q5I=";
-      # }
-    ];
+    nixpkgsPRPatches = [ ];
 
     # Custom patches that don't fit the PR template
     nixpkgsCustomPatches = [ ];
@@ -361,10 +337,6 @@
         name = "nixpkgs-patched";
         src = nixpkgs;
         patches = map bootstrapPkgs.fetchpatch allNixpkgsPatches;
-        prePatch = ''
-          mkdir -p pkgs/by-name/an/antigravity
-          mkdir -p pkgs/by-name/pl/playwright-cli
-        '';
       };
       # Get eval-config from patched source
       evalConfig = import "${patchedSource}/nixos/lib/eval-config.nix";
diff --git a/nixos/overlay.nix b/nixos/overlay.nix
index dc1ba6d1..0c17ff40 100644
--- a/nixos/overlay.nix
+++ b/nixos/overlay.nix
@@ -254,6 +254,10 @@ in
     };
   });
 
+  happy-coder = final.callPackage ./packages/happy-coder { };
+  playwright-cli = final.callPackage ./packages/playwright-cli { };
+  t3code = final.callPackage ./packages/t3code { };
+
   # Custom Waybar fork for workspace taskbar support + external SNI watcher option.
   waybar = prev.waybar.overrideAttrs (old: {
     src = prev.fetchFromGitHub {
diff --git a/nixos/packages/happy-coder/default.nix b/nixos/packages/happy-coder/default.nix
new file mode 100644
index 00000000..6f2a742c
--- /dev/null
+++ b/nixos/packages/happy-coder/default.nix
@@ -0,0 +1,119 @@
+{
+  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/$bin.mjs"
+      done
+
+      runHook postInstall
+    '';
+
+    meta = {
+      description = "Mobile and web client wrapper for Claude Code and Codex with end-to-end encryption";
+      homepage = "https://github.com/slopus/happy";
+      license = lib.licenses.mit;
+      maintainers = with lib.maintainers; [ onsails ];
+      mainProgram = "happy";
+    };
+  }
+)
diff --git a/nixos/packages/playwright-cli/default.nix b/nixos/packages/playwright-cli/default.nix
new file mode 100644
index 00000000..d53fe28f
--- /dev/null
+++ b/nixos/packages/playwright-cli/default.nix
@@ -0,0 +1,52 @@
+{
+  lib,
+  buildNpmPackage,
+  fetchFromGitHub,
+  makeBinaryWrapper,
+  playwright-driver,
+  versionCheckHook,
+  writeShellScript,
+}:
+
+buildNpmPackage (finalAttrs: {
+  pname = "playwright-cli";
+  version = "0.1.1";
+
+  src = fetchFromGitHub {
+    owner = "microsoft";
+    repo = "playwright-cli";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-Ao3phIPinliFDK04u/V3ouuOfwMDVf/qBUpQPESziFQ=";
+  };
+
+  npmDepsHash = "sha256-4x3ozVrST6LtLoHl9KtmaOKrkYwCK84fwEREaoNaESc=";
+
+  dontNpmBuild = true;
+
+  # playwright-cli imports playwright/lib/cli/client/program, which current
+  # nixpkgs playwright-test does not export, so keep the vendored Playwright
+  # until nixpkgs Playwright is updated to a compatible version.
+  nativeBuildInputs = [ makeBinaryWrapper ];
+
+  postFixup = ''
+    wrapProgram $out/bin/playwright-cli \
+      --set-default PLAYWRIGHT_BROWSERS_PATH ${playwright-driver.browsers}
+  '';
+
+  doInstallCheck = true;
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  versionCheckProgram = writeShellScript "version-check" ''
+    "$1" --version >/dev/null
+    echo "${finalAttrs.version}"
+  '';
+  versionCheckProgramArg = "${placeholder "out"}/bin/playwright-cli";
+
+  meta = {
+    description = "Playwright CLI for browser automation";
+    homepage = "https://github.com/microsoft/playwright-cli";
+    changelog = "https://github.com/microsoft/playwright-cli/releases/tag/v${finalAttrs.version}";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ imalison ];
+    mainProgram = "playwright-cli";
+  };
+})
diff --git a/nixos/packages/t3code/canonicalize-node-modules.ts b/nixos/packages/t3code/canonicalize-node-modules.ts
new file mode 100644
index 00000000..f053b9a4
--- /dev/null
+++ b/nixos/packages/t3code/canonicalize-node-modules.ts
@@ -0,0 +1,105 @@
+import { lstat, mkdir, readdir, rm, symlink } from "fs/promises";
+import { join, relative } from "path";
+
+type Entry = {
+  dir: string;
+  version: string;
+};
+
+async function isDirectory(path: string) {
+  try {
+    const info = await lstat(path);
+    return info.isDirectory();
+  } catch {
+    return false;
+  }
+}
+
+const isValidSemver = (version: string) => Bun.semver.satisfies(version, "x.x.x");
+
+const bunRoot = join(process.cwd(), "node_modules/.bun");
+const linkRoot = join(bunRoot, "node_modules");
+const directories = (await readdir(bunRoot)).sort();
+
+const versions = new Map<string, Entry[]>();
+
+for (const entry of directories) {
+  const full = join(bunRoot, entry);
+  if (!(await isDirectory(full))) {
+    continue;
+  }
+
+  const parsed = parseEntry(entry);
+  if (!parsed) {
+    continue;
+  }
+
+  const list = versions.get(parsed.name) ?? [];
+  list.push({ dir: full, version: parsed.version });
+  versions.set(parsed.name, list);
+}
+
+const selections = new Map<string, Entry>();
+
+for (const [slug, list] of versions) {
+  list.sort((a, b) => {
+    const aValid = isValidSemver(a.version);
+    const bValid = isValidSemver(b.version);
+
+    if (aValid && bValid) {
+      return -Bun.semver.order(a.version, b.version);
+    }
+    if (aValid) {
+      return -1;
+    }
+    if (bValid) {
+      return 1;
+    }
+    return b.version.localeCompare(a.version);
+  });
+
+  const first = list[0];
+  if (first) {
+    selections.set(slug, first);
+  }
+}
+
+await rm(linkRoot, { recursive: true, force: true });
+await mkdir(linkRoot, { recursive: true });
+
+for (const [slug, entry] of Array.from(selections.entries()).sort((a, b) => a[0].localeCompare(b[0]))) {
+  const parts = slug.split("/");
+  const leaf = parts.pop();
+  if (!leaf) {
+    continue;
+  }
+
+  const parent = join(linkRoot, ...parts);
+  await mkdir(parent, { recursive: true });
+
+  const linkPath = join(parent, leaf);
+  const desired = join(entry.dir, "node_modules", slug);
+  if (!(await isDirectory(desired))) {
+    continue;
+  }
+
+  const relativeTarget = relative(parent, desired);
+  await rm(linkPath, { recursive: true, force: true });
+  await symlink(relativeTarget.length == 0 ? "." : relativeTarget, linkPath);
+}
+
+function parseEntry(label: string) {
+  const marker = label.startsWith("@") ? label.indexOf("@", 1) : label.indexOf("@");
+  if (marker <= 0) {
+    return null;
+  }
+
+  const name = label.slice(0, marker).replace(/\+/g, "/");
+  const version = label.slice(marker + 1);
+
+  if (!name || !version) {
+    return null;
+  }
+
+  return { name, version };
+}
diff --git a/nixos/packages/t3code/default.nix b/nixos/packages/t3code/default.nix
new file mode 100644
index 00000000..616c62f1
--- /dev/null
+++ b/nixos/packages/t3code/default.nix
@@ -0,0 +1,250 @@
+{
+  buildPackages,
+  lib,
+  stdenv,
+  stdenvNoCC,
+  fetchFromGitHub,
+  nix-update-script,
+  makeDesktopItem,
+  electron_40,
+  nodejs,
+}:
+
+stdenv.mkDerivation (
+  finalAttrs:
+  let
+    electron = electron_40;
+    nodeModules = stdenvNoCC.mkDerivation {
+      pname = "${finalAttrs.pname}-node_modules";
+      inherit (finalAttrs) src version strictDeps;
+
+      nativeBuildInputs = [
+        buildPackages.bun
+        buildPackages.nodejs
+        buildPackages.writableTmpDirAsHomeHook
+      ];
+
+      dontConfigure = true;
+      dontFixup = true;
+
+      postPatch = ''
+        replacePackageVersion() {
+          local packageJson="$1"
+          local currentVersion="$(sed -n 's/.*"version": "\([^"]*\)".*/\1/p' "$packageJson" | head -n1)"
+          local currentVersionPattern
+
+          printf -v currentVersionPattern '"version": "%s"' "$currentVersion"
+
+          substituteInPlace "$packageJson" \
+            --replace-fail "$currentVersionPattern" '"version": "${finalAttrs.version}"'
+        }
+
+        for packageJson in \
+          apps/{desktop,server,web}/package.json \
+          packages/{contracts,shared}/package.json
+        do
+          replacePackageVersion "$packageJson"
+        done
+
+        for packageJson in packages/{contracts,shared}/package.json; do
+          substituteInPlace "$packageJson" \
+            --replace-fail '"prepare": "effect-language-service patch",' '"prepare": "true",'
+        done
+      '';
+
+      buildPhase = ''
+        runHook preBuild
+
+        bun install \
+          --cpu="*" \
+          --ignore-scripts \
+          --no-progress \
+          --frozen-lockfile \
+          --os="*"
+
+        bun --bun ${./canonicalize-node-modules.ts}
+        bun --bun ${./normalize-bun-binaries.ts}
+
+        runHook postBuild
+      '';
+
+      installPhase = ''
+        runHook preInstall
+
+        mkdir -p $out
+        cp -r node_modules $out
+        find apps packages -type d -name node_modules -exec cp -r --parents {} $out \;
+
+        runHook postInstall
+      '';
+
+      outputHash = "sha256-yrzdhw+NPYZku10piHoxMy+TUJ8MYySZorMOMOztJY4=";
+      outputHashMode = "recursive";
+    };
+  in
+  {
+    pname = "t3code";
+    version = "0.0.15";
+    strictDeps = true;
+
+    src = fetchFromGitHub {
+      owner = "pingdotgg";
+      repo = "t3code";
+      tag = "v${finalAttrs.version}";
+      hash = "sha256-HOPiA8X/FzswKGmOuYKog3YIn5iq5rJ/7kDoGhN11x0=";
+    };
+
+    postPatch = ''
+      replacePackageVersion() {
+        local packageJson="$1"
+        local currentVersion="$(sed -n 's/.*"version": "\([^"]*\)".*/\1/p' "$packageJson" | head -n1)"
+        local currentVersionPattern
+
+        printf -v currentVersionPattern '"version": "%s"' "$currentVersion"
+
+        substituteInPlace "$packageJson" \
+          --replace-fail "$currentVersionPattern" '"version": "${finalAttrs.version}"'
+      }
+
+      for packageJson in \
+        apps/{desktop,server,web}/package.json \
+        packages/contracts/package.json
+      do
+        replacePackageVersion "$packageJson"
+      done
+
+      printf -v resourcePathSearch '%s\n%s' \
+        'Path.join(__dirname, "../prod-resources", fileName),' \
+        '    Path.join(process.resourcesPath, "resources", fileName),'
+      printf -v resourcePathReplacement '%s\n%s\n%s' \
+        'Path.join(__dirname, "../prod-resources", fileName),' \
+        '    Path.join(ROOT_DIR, "apps", "desktop", "prod-resources", fileName),' \
+        '    Path.join(process.resourcesPath, "resources", fileName),'
+
+      substituteInPlace apps/desktop/src/main.ts \
+        --replace-fail "$resourcePathSearch" "$resourcePathReplacement"
+
+      substituteInPlace apps/web/vite.config.ts \
+        --replace-fail '  server: {' $'  server: {\n    host: "127.0.0.1",' \
+        --replace-fail 'host: "localhost"' 'host: "127.0.0.1"'
+    '';
+
+    nativeBuildInputs = [
+      buildPackages.bun
+      buildPackages.copyDesktopItems
+      buildPackages.installShellFiles
+      buildPackages.makeBinaryWrapper
+      buildPackages.node-gyp
+      buildPackages.nodejs
+      buildPackages.python3
+      buildPackages.writableTmpDirAsHomeHook
+    ] ++ lib.optionals stdenv.buildPlatform.isDarwin [
+      buildPackages.cctools.libtool
+      buildPackages.xcbuild
+    ];
+
+    nativeInstallCheckInputs = [ buildPackages.versionCheckHook ];
+    doInstallCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform;
+
+    configurePhase = ''
+      runHook preConfigure
+
+      cp -r ${nodeModules}/. .
+
+      chmod -R u+rwX node_modules
+      patchShebangs node_modules
+
+      export npm_config_nodedir=${nodejs}
+      cd node_modules/.bun/node-pty@*/node_modules/node-pty
+      node-gyp rebuild
+      node scripts/post-install.js
+      cd -
+
+      runHook postConfigure
+    '';
+
+    buildPhase = ''
+      runHook preBuild
+
+      for app in web server desktop; do
+        bun run --cwd apps/"$app" build
+      done
+
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p "$out"/libexec/t3code/apps/desktop "$out"/libexec/t3code/apps/server
+      cp -r --no-preserve=mode node_modules "$out"/libexec/t3code
+      cp -r --no-preserve=mode apps/server/{node_modules,dist} "$out"/libexec/t3code/apps/server
+      cp -r --no-preserve=mode apps/desktop/{node_modules,dist-electron} "$out"/libexec/t3code/apps/desktop
+
+      mkdir -p "$out"/libexec/t3code/apps/desktop/prod-resources
+      install -m444 assets/prod/black-universal-1024.png \
+        "$out"/libexec/t3code/apps/desktop/prod-resources/icon.png
+
+      find "$out"/libexec/t3code -xtype l -delete
+
+      makeWrapper ${lib.getExe nodejs} "$out"/bin/t3code \
+        --add-flags "$out"/libexec/t3code/apps/server/dist/index.mjs
+
+      makeWrapper ${lib.getExe electron} "$out"/bin/t3code-desktop \
+        --add-flags "$out"/libexec/t3code/apps/desktop/dist-electron/main.js \
+        --inherit-argv0
+
+      mkdir -p \
+        "$out"/share/icons/hicolor/1024x1024/apps \
+        "$out"/share/icons/hicolor/scalable/apps
+      install -m444 assets/prod/black-universal-1024.png \
+        "$out"/share/icons/hicolor/1024x1024/apps/t3code.png
+      install -m444 assets/prod/logo.svg \
+        "$out"/share/icons/hicolor/scalable/apps/t3code.svg
+
+      runHook postInstall
+    '';
+
+    postInstall = lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
+      installShellCompletion --cmd t3code \
+        --bash <("$out"/bin/t3code --completions bash) \
+        --fish <("$out"/bin/t3code --completions fish) \
+        --zsh <("$out"/bin/t3code --completions zsh)
+    '';
+
+    desktopItems = [
+      (makeDesktopItem {
+        name = "t3code";
+        desktopName = "T3 Code";
+        comment = finalAttrs.meta.description;
+        exec = "t3code-desktop %U";
+        terminal = false;
+        icon = "t3code";
+        startupWMClass = "T3 Code";
+        categories = [ "Development" ];
+      })
+    ];
+
+    passthru = {
+      inherit nodeModules;
+      updateScript = nix-update-script {
+        extraArgs = [
+          "--subpackage"
+          "nodeModules"
+        ];
+      };
+    };
+
+    meta = {
+      description = "Minimal web GUI for coding agents";
+      homepage = "https://t3.codes";
+      inherit (nodejs.meta) platforms;
+      license = lib.licenses.mit;
+      maintainers = with lib.maintainers; [
+        imalison
+        qweered
+      ];
+      mainProgram = "t3code";
+    };
+  }
+)
diff --git a/nixos/packages/t3code/normalize-bun-binaries.ts b/nixos/packages/t3code/normalize-bun-binaries.ts
new file mode 100644
index 00000000..231b673d
--- /dev/null
+++ b/nixos/packages/t3code/normalize-bun-binaries.ts
@@ -0,0 +1,135 @@
+import { lstat, mkdir, readdir, rm, symlink } from "fs/promises";
+import { join, relative } from "path";
+
+type PackageManifest = {
+  name?: string;
+  bin?: string | Record<string, string>;
+};
+
+const bunRoot = join(process.cwd(), "node_modules/.bun");
+const bunEntries = (await readdir(bunRoot)).sort();
+
+for (const entry of bunEntries) {
+  const modulesRoot = join(bunRoot, entry, "node_modules");
+  if (!(await exists(modulesRoot))) {
+    continue;
+  }
+
+  const binRoot = join(modulesRoot, ".bin");
+  await rm(binRoot, { recursive: true, force: true });
+  await mkdir(binRoot, { recursive: true });
+
+  const packageDirs = await collectPackages(modulesRoot);
+  for (const packageDir of packageDirs) {
+    const manifest = await readManifest(packageDir);
+    if (!manifest?.bin) {
+      continue;
+    }
+
+    const seen = new Set<string>();
+    if (typeof manifest.bin == "string") {
+      const fallback = manifest.name ?? packageDir.split("/").pop();
+      if (fallback) {
+        await linkBinary(binRoot, fallback, packageDir, manifest.bin, seen);
+      }
+      continue;
+    }
+
+    const entries = Object.entries(manifest.bin).sort((a, b) => a[0].localeCompare(b[0]));
+    for (const [name, target] of entries) {
+      await linkBinary(binRoot, name, packageDir, target, seen);
+    }
+  }
+}
+
+async function collectPackages(modulesRoot: string) {
+  const found: string[] = [];
+  const topLevel = (await readdir(modulesRoot)).sort();
+
+  for (const name of topLevel) {
+    if (name == ".bin" || name == ".bun") {
+      continue;
+    }
+
+    const full = join(modulesRoot, name);
+    if (!(await isDirectory(full))) {
+      continue;
+    }
+
+    if (name.startsWith("@")) {
+      const scoped = (await readdir(full)).sort();
+      for (const child of scoped) {
+        const scopedDir = join(full, child);
+        if (await isDirectory(scopedDir)) {
+          found.push(scopedDir);
+        }
+      }
+      continue;
+    }
+
+    found.push(full);
+  }
+
+  return found.sort();
+}
+
+async function readManifest(dir: string) {
+  const file = Bun.file(join(dir, "package.json"));
+  if (!(await file.exists())) {
+    return null;
+  }
+
+  return (await file.json()) as PackageManifest;
+}
+
+async function linkBinary(
+  binRoot: string,
+  name: string,
+  packageDir: string,
+  target: string,
+  seen: Set<string>,
+) {
+  if (!name || !target) {
+    return;
+  }
+
+  const normalizedName = normalizeBinName(name);
+  if (seen.has(normalizedName)) {
+    return;
+  }
+
+  const resolved = join(packageDir, target);
+  const script = Bun.file(resolved);
+  if (!(await script.exists())) {
+    return;
+  }
+
+  seen.add(normalizedName);
+  const destination = join(binRoot, normalizedName);
+  const relativeTarget = relative(binRoot, resolved);
+  await rm(destination, { force: true });
+  await symlink(relativeTarget.length == 0 ? "." : relativeTarget, destination);
+}
+
+async function exists(path: string) {
+  try {
+    await lstat(path);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function isDirectory(path: string) {
+  try {
+    const info = await lstat(path);
+    return info.isDirectory();
+  } catch {
+    return false;
+  }
+}
+
+function normalizeBinName(name: string) {
+  const slash = name.lastIndexOf("/");
+  return slash >= 0 ? name.slice(slash + 1) : name;
+}