diff --git a/flake.lock b/flake.lock
index b0f0b7c..8f1f5ec 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1676209454,
-        "narHash": "sha256-alj9mBkV9U6tTPDK026671D2pesLSYZZc9j5dBZJ9f0=",
+        "lastModified": 1676426280,
+        "narHash": "sha256-7DltKPrvCP0A9Iemv2ts1vnBYn5xQKScK/sb1VALlao=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "8c619a1f3cedd16ea172146e30645e703d21bfc1",
+        "rev": "6d33e5e14fd12f99ba621683ae90cebadda753ca",
         "type": "github"
       },
       "original": {
diff --git a/overlay.nix b/overlay.nix
index a95fc51..9b29914 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -13,4 +13,5 @@ in
   inherit (custom) phantomjs;
   inherit (custom) q;
   inherit (custom) website-docs-nifoc-pw;
+  inherit (custom) wezterm-unstable;
 }
diff --git a/packages.nix b/packages.nix
index 26a2692..9e3d763 100644
--- a/packages.nix
+++ b/packages.nix
@@ -10,4 +10,5 @@
   phantomjs = import ./packages/phantomjs.nix { inherit system lib pkgs; };
   q = import ./packages/q.nix { inherit system lib pkgs; };
   website-docs-nifoc-pw = import ./packages/website-docs-nifoc-pw.nix { inherit system lib pkgs; };
+  wezterm-unstable = import ./packages/wezterm-unstable.nix { inherit system lib pkgs; };
 }
diff --git a/packages/wezterm-unstable.nix b/packages/wezterm-unstable.nix
new file mode 100644
index 0000000..efd653c
--- /dev/null
+++ b/packages/wezterm-unstable.nix
@@ -0,0 +1,86 @@
+{ system, lib, pkgs }:
+
+# Quick and dirty copy of the nixpkgs file: https://github.com/NixOS/nixpkgs/blob/777bc8162088e120fa14638265697fa4394fbe79/pkgs/applications/terminal-emulators/wezterm/default.nix
+
+pkgs.rustPlatform.buildRustPackage rec {
+  pname = "wezterm";
+  version = "unstable-2023-02-12";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "wez";
+    repo = pname;
+    rev = "a5c2b1f3adb06054bf522cb3d350697938d6f8e9";
+    fetchSubmodules = true;
+    sha256 = "sha256-jQK8mSQGBztzSFYNGeL5TP2xUY6Xd4FaLkVvBahpzRY=";
+  };
+
+  postPatch = ''
+    echo ${version} > .tag
+    # tests are failing with: Unable to exchange encryption keys
+    rm -r wezterm-ssh/tests
+  '';
+
+  cargoSha256 = "sha256-lO9EMhRV6uf85N24vZo/CNcHzl70VFt9CP69enGQnpY=";
+
+  nativeBuildInputs = with pkgs; [
+    installShellFiles
+    ncurses # tic for terminfo
+    pkg-config
+    python3
+  ] ++ lib.optional stdenv.isDarwin perl;
+
+  buildInputs = with pkgs; [
+    fontconfig
+    zlib
+  ] ++ lib.optionals stdenv.isDarwin (with pkgs.darwin.apple_sdk.frameworks; [
+    Cocoa
+    CoreGraphics
+    Foundation
+    libiconv
+    UserNotifications
+  ]);
+
+  buildFeatures = [ "distro-defaults" ];
+
+  postInstall = ''
+    mkdir -p $out/nix-support
+    echo "${passthru.terminfo}" >> $out/nix-support/propagated-user-env-packages
+    install -Dm644 assets/icon/terminal.png $out/share/icons/hicolor/128x128/apps/org.wezfurlong.wezterm.png
+    install -Dm644 assets/wezterm.desktop $out/share/applications/org.wezfurlong.wezterm.desktop
+    install -Dm644 assets/wezterm.appdata.xml $out/share/metainfo/org.wezfurlong.wezterm.appdata.xml
+    install -Dm644 assets/shell-integration/wezterm.sh -t $out/etc/profile.d
+    installShellCompletion --cmd wezterm \
+      --bash assets/shell-completion/bash \
+      --fish assets/shell-completion/fish \
+      --zsh assets/shell-completion/zsh
+    install -Dm644 assets/wezterm-nautilus.py -t $out/share/nautilus-python/extensions
+  '';
+
+  preFixup = lib.optionalString pkgs.stdenv.isDarwin ''
+    mkdir -p "$out/Applications"
+    OUT_APP="$out/Applications/WezTerm.app"
+    cp -r assets/macos/WezTerm.app "$OUT_APP"
+    rm $OUT_APP/*.dylib
+    cp -r assets/shell-integration/* "$OUT_APP"
+    ln -s $out/bin/{wezterm,wezterm-mux-server,wezterm-gui,strip-ansi-escapes} "$OUT_APP"
+  '';
+
+  passthru = {
+    terminfo = pkgs.runCommand "wezterm-terminfo"
+      {
+        nativeBuildInputs = with pkgs; [
+          ncurses
+        ];
+      } ''
+      mkdir -p $out/share/terminfo $out/nix-support
+      tic -x -o $out/share/terminfo ${src}/termwiz/data/wezterm.terminfo
+    '';
+  };
+
+  meta = with lib; {
+    description = "A GPU-accelerated cross-platform terminal emulator and multiplexer written by @wez and implemented in Rust";
+    homepage = "https://wezfurlong.org/wezterm";
+    license = licenses.mit;
+    platforms = [ "x86_64-darwin" "aarch64-darwin" ];
+  };
+}