diff --git a/ci.nix b/ci.nix
index a7b8b6a2..fb0c730f 100644
--- a/ci.nix
+++ b/ci.nix
@@ -35,6 +35,7 @@ in
       xo-numeric
       xo-tokenizer2
       xo-expression2
+      xo-reader2
       xo-allocutil
       xo-alloc
       xo-ratio
diff --git a/pkgs/xo-reader2.nix b/pkgs/xo-reader2.nix
new file mode 100644
index 00000000..7067c4a8
--- /dev/null
+++ b/pkgs/xo-reader2.nix
@@ -0,0 +1,43 @@
+{
+  # nixpkgs dependencies
+  lib, stdenv, cmake, catch2,
+
+  # xo dependencies
+  xo-numeric,
+  xo-procedure2,
+  xo-type,
+  xo-expression2,
+  xo-tokenizer2,
+  xo-gc,
+  xo-subsys,
+  xo-cmake,
+
+  # config arguments
+  doCheck ? true
+} :
+
+stdenv.mkDerivation (finalattrs :
+  {
+    name = "xo-expression2";
+
+    src = ../xo-expression2;
+
+    cmakeFlags = ["-DCMAKE_MODULE_PATH=${xo-cmake}/share/cmake"]
+                  ++ lib.optionals doCheck ["-DENABLE_TESTING=1"];
+
+    inherit doCheck;
+
+    nativeBuildInputs = [
+      cmake catch2
+      xo-cmake
+    ];
+    propagatedBuildInputs = [
+      xo-numeric
+      xo-procedure2
+      xo-type
+      xo-expression2
+      xo-tokenizer2
+      xo-gc
+      xo-subsys
+    ];
+  })
diff --git a/shells.nix b/shells.nix
index 7d563043..8078c94a 100644
--- a/shells.nix
+++ b/shells.nix
@@ -341,6 +341,7 @@ in
     numeric        = pkgs.xo-numeric;
     tokenizer2     = pkgs.xo-tokenizer2;
     expression2    = pkgs.xo-expression2;
+    reader2        = pkgs.xo-reader2;
 
     allocutil      = pkgs.xo-allocutil;
     alloc          = pkgs.xo-alloc;
diff --git a/xo-cmake/etc/xo/subsystem-list b/xo-cmake/etc/xo/subsystem-list
index eea49525..61b69310 100644
--- a/xo-cmake/etc/xo/subsystem-list
+++ b/xo-cmake/etc/xo/subsystem-list
@@ -52,3 +52,8 @@ xo-process
 xo-pyprocess
 xo-kalmanfilter
 xo-pykalmanfilter
+xo-imgui
+xo-interpreter
+xo-interpreter2
+xo-reader2
+xo-symboltable
diff --git a/xo-pyrprintjson/.github/workflows/main.yml b/xo-pyrprintjson/.github/workflows/main.yml
deleted file mode 100644
index af5526f6..00000000
--- a/xo-pyrprintjson/.github/workflows/main.yml
+++ /dev/null
@@ -1,196 +0,0 @@
-name: build xo-pyprintjson + dependencies
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-
-env:
-  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
-  BUILD_TYPE: Release
-
-jobs:
-  build:
-    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
-    # You can convert this to a matrix build if you need cross-platform coverage.
-    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: checkout source
-      uses: actions/checkout@v3
-
-    - name: Install catch2
-      # install catch2.  see [[https://stackoverflow.com/questions/57982945/how-to-apt-get-install-in-a-github-actions-workflow]]
-      run: sudo apt-get install -y catch2
-
-    - name: Install pybind11-dev
-      run: sudo apt-get install -y pybind11-dev
-
-    # ----------------------------------------------------------------
-
-    - name: Clone xo-cmake
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/xo-cmake
-        path: repo/xo-cmake
-
-    - name: Configure xo-cmake
-      run: cmake -B ${{github.workspace}}/build_xo-cmake -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/xo-cmake
-
-    - name: Build xo-cmake (trivial)
-      run: cmake --build ${{github.workspace}}/build_xo-cmake --config ${{env.BUILD_TYPE}}
-
-    - name: Install xo-cmake
-      run: cmake --install ${{github.workspace}}/build_xo-cmake
-
-    # ----------------------------------------------------------------
-
-    - name: Clone indentlog
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/indentlog
-        path: repo/indentlog
-
-    - name: Configure indentlog
-      # configure cmake for indentlog in dedicated build directory.
-      run: cmake -B ${{github.workspace}}/build_indentlog -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/indentlog
-
-    - name: Build indentlog
-      run: cmake --build ${{github.workspace}}/build_indentlog --config ${{env.BUILD_TYPE}}
-
-    - name: Install indentlog
-      # install into ${{github.workspace}}/local
-      run: cmake --install ${{github.workspace}}/build_indentlog
-
-    # ----------------------------------------------------------------
-
-    - name: Clone subsys
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/subsys
-        path: repo/subsys
-
-    - name: Configure subsys
-      # configure cmake for subsys in dedicated build directory.
-      run: cmake -B ${{github.workspace}}/build_subsys -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/subsys
-
-    - name: Build subsys
-      run: cmake --build ${{github.workspace}}/build_subsys --config ${{env.BUILD_TYPE}}
-
-    - name: Install subsys
-      # install into ${{github.workspace}}/local
-      run: cmake --install ${{github.workspace}}/build_subsys
-
-    # ----------------------------------------------------------------
-
-    - name: Clone refcnt
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/refcnt
-        path: repo/refcnt
-
-    - name: Configure refcnt
-      # configure cmake for refcnt in dedicated build directory.
-      run: cmake -B ${{github.workspace}}/build_refcnt -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/local -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/refcnt
-
-    - name: Build refcnt
-      run: cmake --build ${{github.workspace}}/build_refcnt --config ${{env.BUILD_TYPE}}
-
-    - name: Install refcnt
-      # install into ${{github.workspace}}/local
-      run: cmake --install ${{github.workspace}}/build_refcnt
-
-    # ----------------------------------------------------------------
-
-    - name: Clone reflect
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/reflect
-        path: repo/reflect
-
-    - name: Configure reflect
-      # configure cmake for reflect in dedicated build directory.
-      run: cmake -B ${{github.workspace}}/build_reflect -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/local -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/reflect
-
-    - name: Build reflect
-      run: cmake --build ${{github.workspace}}/build_reflect --config ${{env.BUILD_TYPE}}
-
-    - name: Install reflect
-      # install into ${{github.workspace}}/local
-      run: cmake --install ${{github.workspace}}/build_reflect
-
-    # ----------------------------------------------------------------
-
-    - name: Clone printjson
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/xo-printjson
-        path: repo/printjson
-
-    - name: Configure printjson
-      # configure cmake for printjson in dedicated build directory.
-      run: cmake -B ${{github.workspace}}/build_printjson -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/local -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/printjson
-
-    - name: Build printjson
-      run: cmake --build ${{github.workspace}}/build_printjson --config ${{env.BUILD_TYPE}}
-
-    - name: Install printjson
-      # install into ${{github.workspace}}/local
-      run: cmake --install ${{github.workspace}}/build_printjson
-
-    # ----------------------------------------------------------------
-
-    - name: Clone pyutil
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/xo-pyutil
-        path: repo/pyutil
-
-    - name: Configure pyutil
-      # configure cmake for pyutil in dedicated build directory.
-      run: cmake -B ${{github.workspace}}/build_pyutil -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/local -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/pyutil
-
-    - name: Build pyutil
-      run: cmake --build ${{github.workspace}}/build_pyutil --config ${{env.BUILD_TYPE}}
-
-    - name: Install pyutil
-      # install into ${{github.workspace}}/local
-      run: cmake --install ${{github.workspace}}/build_pyutil
-
-    # ----------------------------------------------------------------
-
-    - name: Clone pyreflect
-      uses: actions/checkout@v3
-      with:
-        repository: Rconybea/xo-pyreflect
-        path: repo/pyreflect
-
-    - name: Configure pyreflect
-      # configure cmake for pyreflect in dedicated build directory.
-      run: cmake -B ${{github.workspace}}/build_pyreflect -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/local -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local repo/pyreflect
-
-    - name: Build pyreflect
-      run: cmake --build ${{github.workspace}}/build_pyreflect --config ${{env.BUILD_TYPE}}
-
-    - name: Install pyreflect
-      # install into ${{github.workspace}}/local
-      run: cmake --install ${{github.workspace}}/build_pyreflect
-
-    # ----------------------------------------------------------------
-
-    - name: Configure self (pyprintjson)
-      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
-      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
-      run: cmake -B ${{github.workspace}}/build_pyprintjson -DCMAKE_MODULE_PATH=${{github.workspace}}/local/share/cmake -DCMAKE_PREFIX_PATH=${{github.workspace}}/local -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/local -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
-
-    - name: Build self (pyprintjson)
-      # Build your program with the given configuration
-      run: cmake --build ${{github.workspace}}/build_pyprintjson --config ${{env.BUILD_TYPE}}
-
-    - name: Test self (pyprintjson)
-      working-directory: ${{github.workspace}}/build_pyprintjson
-      # Execute tests defined by the CMake configuration.
-      # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
-      run: ctest -C ${{env.BUILD_TYPE}}
diff --git a/xo-pyrprintjson/.gitignore b/xo-pyrprintjson/.gitignore
deleted file mode 100644
index 13c0afb7..00000000
--- a/xo-pyrprintjson/.gitignore
+++ /dev/null
@@ -1,6 +0,0 @@
-# clangd working space (see emacs+lsp)
-.cache
-# typical cmake build directory (source-tree-nephew)
-.build*
-# symlink to builddir/compile_commands.json;  should be set manually in dev sandbox
-compile_commands.json
diff --git a/xo-pyrprintjson/CMakeLists.txt b/xo-pyrprintjson/CMakeLists.txt
deleted file mode 100644
index dd29fbc9..00000000
--- a/xo-pyrprintjson/CMakeLists.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-# xo-pyprintjson/CMakeLists.txt
-
-cmake_minimum_required(VERSION 3.10)
-
-project(xo_pyprintjson VERSION 1.0)
-
-include(GNUInstallDirs)
-include(cmake/xo-bootstrap-macros.cmake)
-
-xo_cxx_toplevel_options3()
-
-# ----------------------------------------------------------------
-# c++ settings (usually temporary)
-
-set(PROJECT_CXX_FLAGS "")
-add_definitions(${PROJECT_CXX_FLAGS})
-
-# ----------------------------------------------------------------
-# sources
-
-add_subdirectory(src/pyprintjson)
-#add_subdirectory(utest)
-
-# ----------------------------------------------------------------
-# provide find_package() support
-
-xo_export_cmake_config(${PROJECT_NAME} ${PROJECT_VERSION} ${PROJECT_NAME}Targets)
-
-# end CMakeLists.txt
diff --git a/xo-pyrprintjson/README.md b/xo-pyrprintjson/README.md
deleted file mode 100644
index e85bc227..00000000
--- a/xo-pyrprintjson/README.md
+++ /dev/null
@@ -1,71 +0,0 @@
-# python bindings for c++ printjson library (xo-printjson)
-
-## Getting Started
-
-### build + install dependencies
-
-- [github/Rconybea/xo-pyutil](https://github.com/Rconybea/xo-pyutil)
-- [github/Rconybea/xo-printjson](https://github.com/Rconybea/xo-printjson)
-
-### build + install
-
-```
-$ cd xo-pyprintjson
-$ mkdir build
-$ cd build
-$ INSTALL_PREFIX=/usr/local  # or wherever you prefer, e.g. ~/local
-$ cmake \
-    -DCMAKE_MODULE_PATH=${INSTALL_PREFIX}/share/cmake \
-    -DCMAKE_PREFIX_PATH=${INSTALL_PREFIX} \
-    -DCMAKE_INSTALL_PREFIX=${INSTALL_PREFIX} ..
-$ make
-$ make install
-```
-(also see .github/workflows/main.yml)
-
-## Examples
-
-```
-PYTHONPATH=~/local2/lib:$PYTHONPATH python
->>> import xo_pyprintjson
->>> dir(xo_pyprintjson)
-['PrintJson', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__']
->>> dir(xo_pyprintjson.PrintJson)
-['__class__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getstate__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'instance', 'print']
->>>
-```
-
-## Development
-
-### build for unit test coverage
-```
-$ cd xo-pyprintjson
-$ mkdir build-ccov
-$ cd build-ccov
-$ cmake \
-    -DCMAKE_MODULE_PATH=${INSTALL_PREFIX}/share/cmake \
-    -DCMAKE_PREFIX_PATH=${INSTALL_PREFIX} \
-    -DCODE_COVERAGE=ON \
-    -DCMAKE_BUILD_TYPE=Debug ..
-```
-
-### LSP (language server) support
-
-LSP looks for compile commands in the root of the source tree;
-while Cmake creates them in the root of its build directory.
-
-```
-$ cd xo-pyprintjson
-$ ln -s build/compile_commands.json  # supply compile commands to LSP
-```
-
-### display cmake variables
-
-- `-L` list variables
-- `-A` include 'advanced' variables
-- `-H` include help text
-
-```
-$ cd xo-pyprintjson/build
-$ cmake -LAH
-```
diff --git a/xo-pyrprintjson/cmake/xo-bootstrap-macros.cmake b/xo-pyrprintjson/cmake/xo-bootstrap-macros.cmake
deleted file mode 100644
index aba31169..00000000
--- a/xo-pyrprintjson/cmake/xo-bootstrap-macros.cmake
+++ /dev/null
@@ -1,35 +0,0 @@
-# ----------------------------------------------------------------
-# for example:
-#   $ PREFIX=/usr/local   # for example
-#   $ cmake -DCMAKE_MODULE_PATH=prefix -DCMAKE_INSTALL_PREFIX=$PREFIX -B .build
-#
-# will get
-#   CMAKE_MODULE_PATH
-# from xo-cmake-config --cmake-module-path
-#
-# and expect .cmake macros in
-#   CMAKE_MODULE_PATH/xo_macros/xo_cxx.cmake
-# ----------------------------------------------------------------
-
-find_program(XO_CMAKE_CONFIG_EXECUTABLE NAMES xo-cmake-config REQUIRED)
-
-if ("${XO_CMAKE_CONFIG_EXECUTABLE}" STREQUAL "XO_CMAKE_CONFIG_EXECUTABLE-NOT_FOUND")
-    message(FATAL "could not find xo-cmake-config executable")
-endif()
-
-message(STATUS "XO_CMAKE_CONFIG_EXECUTABLE=${XO_CMAKE_CONFIG_EXECUTABLE}")
-
-if (NOT XO_SUBMODULE_BUILD)
-    if (("${CMAKE_MODULE_PATH}" STREQUAL "") OR ("${CMAKE_MODULE_PATH}" STREQUAL prefix))
-        # default to typical install location for xo-project-macros
-        execute_process(COMMAND ${XO_CMAKE_CONFIG_EXECUTABLE} --cmake-module-path OUTPUT_VARIABLE CMAKE_MODULE_PATH)
-        message(STATUS "CMAKE_MODULE_PATH=${CMAKE_MODULE_PATH}")
-    endif()
-endif()
-
-# needs to have been installed somewhere on CMAKE_MODULE_PATH,
-# (e.g. from xo-cmake with the same value for CMAKE_INSTALL_PREFIX)
-#
-include(xo_macros/xo_cxx)
-
-xo_cxx_bootstrap_message()
diff --git a/xo-pyrprintjson/cmake/xo_pyprintjsonConfig.cmake.in b/xo-pyrprintjson/cmake/xo_pyprintjsonConfig.cmake.in
deleted file mode 100644
index eb9a3b16..00000000
--- a/xo-pyrprintjson/cmake/xo_pyprintjsonConfig.cmake.in
+++ /dev/null
@@ -1,5 +0,0 @@
-@PACKAGE_INIT@
-
-include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
-include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Share.cmake")
-check_required_components("@PROJECT_NAME@")
diff --git a/xo-pyrprintjson/include/README.md b/xo-pyrprintjson/include/README.md
deleted file mode 100644
index 5d2b4c67..00000000
--- a/xo-pyrprintjson/include/README.md
+++ /dev/null
@@ -1 +0,0 @@
-placeholder for future pyprintjson #include files
diff --git a/xo-pyrprintjson/src/pyprintjson/CMakeLists.txt b/xo-pyrprintjson/src/pyprintjson/CMakeLists.txt
deleted file mode 100644
index defff223..00000000
--- a/xo-pyrprintjson/src/pyprintjson/CMakeLists.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-# xo_pyprintjson/src/pyprintjson/CMakeLists.txt
-
-set(SELF_LIB xo_pyprintjson)
-set(SELF_SRCS pyprintjson.cpp)
-
-# ----------------------------------------------------------------
-
-xo_pybind11_library(${SELF_LIB} ${PROJECT_NAME}Targets ${SELF_SRCS})
-xo_pybind11_dependency(${SELF_LIB} printjson)
-xo_pybind11_header_dependency(${SELF_LIB} xo_pyreflect)
diff --git a/xo-pyrprintjson/src/pyprintjson/EXAMPLES b/xo-pyrprintjson/src/pyprintjson/EXAMPLES
deleted file mode 100644
index 5965b9b6..00000000
--- a/xo-pyrprintjson/src/pyprintjson/EXAMPLES
+++ /dev/null
@@ -1,2 +0,0 @@
-import pyprintjson
-pj=pyprintjson.PrintJson()
diff --git a/xo-pyrprintjson/src/pyprintjson/pyprintjson.cpp b/xo-pyrprintjson/src/pyprintjson/pyprintjson.cpp
deleted file mode 100644
index 1e107f31..00000000
--- a/xo-pyrprintjson/src/pyprintjson/pyprintjson.cpp
+++ /dev/null
@@ -1,49 +0,0 @@
-/* @file pyprintjson.cpp */
-
-// note: need pyreflect/ here bc pyreflect.hpp is generated, located in build directory
-#include "pyprintjson.hpp"
-#include "xo/pyreflect/pyreflect.hpp"
-
-#include "xo/printjson/PrintJson.hpp"
-#include "xo/reflect/TaggedRcptr.hpp"
-//#include "reflect/SelfTagging.hpp"
-//#include "refcnt/Refcounted.hpp"
-//#include "refcnt/Unowned.hpp"
-#include "xo/pyutil/pyutil.hpp"
-//#include <pybind11/pybind11.h>
-//#include <pybind11/stl.h>
-//#include <pybind11/chrono.h>
-//#include <pybind11/operators.h>
-
-namespace xo {
-    namespace py = pybind11;
-
-    namespace json {
-        using xo::reflect::SelfTagging;
-        using xo::reflect::TaggedRcptr;
-        using xo::ref::unowned_ptr;
-
-        PYBIND11_MODULE(PYPRINTJSON_MODULE_NAME(), m) {
-            PYREFLECT_IMPORT_MODULE();
-
-            py::class_<PrintJson, rp<PrintJson>>(m, "PrintJson")
-                .def_static("instance", &PrintJsonSingleton::instance)
-                .def("print",
-                     [](PrintJson & pj, TaggedRcptr p)
-                         {
-                             pj.print_tp(p, &std::cout); std::cout << "\n";
-                         },
-                     py::arg("value"))
-                .def("print",
-                     [](PrintJson & pj, rp<SelfTagging> const & p)
-                         {
-                             pj.print_obj(p, &std::cout); std::cout << "\n";
-                         },
-                     py::arg("value"));
-
-            //m.def("print_json", [](){ return PrintJsonSingleton::instance_ptr(); });
-        } /*pyprintjson*/
-    } /*namespace json*/
-} /*namespace xo*/
-
-/* end pyprintjson.cpp */
diff --git a/xo-pyrprintjson/src/pyprintjson/pyprintjson.hpp.in b/xo-pyrprintjson/src/pyprintjson/pyprintjson.hpp.in
deleted file mode 100644
index d80e5aba..00000000
--- a/xo-pyrprintjson/src/pyprintjson/pyprintjson.hpp.in
+++ /dev/null
@@ -1,25 +0,0 @@
-/* @file pyprintjson.hpp
- *
- * automatically generated from src/pyprintjson/pyprintjson.hpp.in
- * see src/pyprintjson/CMakeLists.txt
- */
-
-/* python requires module name = library name
- * example:
- *   PYBIND11_MODULE(PYPRINTJSON_MODULE_NAME(), m) { ... }
- */
-#define PYPRINTJSON_MODULE_NAME() @SELF_LIB@
-
-/* example:
- *   py::module_::import(PYPRINTJSON_MODULE_NAME_STR)
- */
-#define PYPRINTJSON_MODULE_NAME_STR "@SELF_LIB@"
-
-/* example:
- *   PYPRINTJSON_IMPORT_MODULE()
- * replaces
- *   py::module_::import("pyprintjson")
- */
-#define PYPRINTJSON_IMPORT_MODULE() py::module_::import("@SELF_LIB@")
-
-/* end pyprintjson.hpp */
diff --git a/xo-reader2/src/reader2/CMakeLists.txt b/xo-reader2/src/reader2/CMakeLists.txt
index c2ba12e9..55aba46f 100644
--- a/xo-reader2/src/reader2/CMakeLists.txt
+++ b/xo-reader2/src/reader2/CMakeLists.txt
@@ -112,7 +112,4 @@ xo_dependency(${SELF_LIB} xo_gc)
 xo_dependency(${SELF_LIB} xo_type)
 xo_dependency(${SELF_LIB} xo_tokenizer2)
 xo_dependency(${SELF_LIB} xo_expression2)
-#xo_dependency(${SELF_LIB} reflect)
-#xo_dependency(${SELF_LIB} xo_flatstring)
 xo_dependency(${SELF_LIB} subsys)
-#xo_dependency(${SELF_LIB} indentlog)
diff --git a/xo.nix b/xo.nix
index 454e4081..25dc826b 100644
--- a/xo.nix
+++ b/xo.nix
@@ -48,6 +48,7 @@ let
     xo-numeric        = callPackage pkgs/xo-numeric.nix        { stdenv = jitStdenv; };
     xo-tokenizer2     = callPackage pkgs/xo-tokenizer2.nix     { stdenv = jitStdenv;                   buildExamples = true; };
     xo-expression2    = callPackage pkgs/xo-expression2.nix    { stdenv = jitStdenv; };
+    xo-reader2        = callPackage pkgs/xo-reader2.nix        { stdenv = jitStdenv; };
     xo-allocutil      = callPackage pkgs/xo-allocutil.nix      { stdenv = jitStdenv; };
     xo-alloc          = callPackage pkgs/xo-alloc.nix          { stdenv = jitStdenv; buildDocs = true; };
     xo-ratio          = callPackage pkgs/xo-ratio.nix          { stdenv = jitStdenv; buildDocs = true; buildExamples = true; };