diff --git a/.github/workflows/build_python.yml b/.github/workflows/build_python.yml
index 5e0e3de5..c57b3567 100644
--- a/.github/workflows/build_python.yml
+++ b/.github/workflows/build_python.yml
@@ -6,12 +6,19 @@ on:
       python_version:
         required: true
         type: string
+      platforms:
+        required: true
+        type: string
+        default: "linux-x86_64,linux-aarch64,linux-i386,linux-arm,linux-riscv64,macos,windows"
       run_tests:
         required: false
         type: boolean
       debug:
         required: false
         type: boolean
+      debug_interactive:
+        required: false
+        type: boolean
       verbose:
         required: false
         type: boolean
@@ -20,6 +27,9 @@ on:
       python_version:
         required: true
         type: string
+      platforms:
+        required: true
+        type: string
       run_tests:
         required: false
         type: boolean
@@ -34,6 +44,7 @@ env:
   RUN_TESTS: ${{ inputs.run_tests }}
   DEBUG_CI: ${{ inputs.debug }}
   VERBOSE_CI: ${{ inputs.verbose }}
+  image_map: '{"x86_64": "amd64/centos:7", "i386": "i386/centos:7", "aarch64": "arm64v8/centos:7", "arm": "arm32v7/debian:bullseye", "riscv64": "riscv64/debian:sid"}'
 
 jobs:
   build_linux:
@@ -42,48 +53,60 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include:
-          - arch: x86_64
-            image: amd64/centos:7
-          - arch: i386
-            image: i386/centos:7
-          - arch: aarch64
-            image: arm64v8/centos:7
-          - arch: arm
-            image: arm32v7/debian:bullseye
-          - arch: riscv64
-            image: riscv64/debian:sid
+        arch: [x86_64, i386, aarch64, arm, riscv64]
+        exclude:
+          - arch: ${{ !contains(inputs.platforms, 'linux-x86_64') && 'x86_64' || '' }}
+          - arch: ${{ !contains(inputs.platforms, 'linux-i386') && 'i386' || '' }}
+          - arch: ${{ !contains(inputs.platforms, 'linux-aarch64') && 'aarch64' || '' }}
+          - arch: ${{ !contains(inputs.platforms, 'linux-arm') && 'arm' || '' }}
+          - arch: ${{ !contains(inputs.platforms, 'linux-riscv64') && 'riscv64' || '' }}
 
     steps:
+      - name: Parse image
+        if: ${{ matrix.arch }}
+        id: parse_image
+        run: |
+          IMAGE=$(echo ${{ toJSON(env.image_map) }} | jq -r '.["${{ matrix.arch }}"]')
+          echo "image=$IMAGE" >> "$GITHUB_OUTPUT"
+
       - name: Set up zig
+        if: ${{ matrix.arch }}
         uses: goto-bus-stop/setup-zig@v2
         with:
           version: 0.12.0-dev.3097+5c0766b6c
 
       - name: Checkout
+        if: ${{ matrix.arch }}
         uses: actions/checkout@v4
 
       - name: Build
+        if: ${{ matrix.arch }}
         run: |
           ./scripts/build_linux_zig.sh ${{ matrix.arch }} ${{ inputs.python_version }}
 
+      - name: Interactive debugging
+        if: ${{ always() && matrix.arch && inputs.debug_interactive }}
+        uses: fawazahmed0/action-debug@v2
+  
       - name: Upload artifacts
+        if: ${{ matrix.arch }}
         uses: actions/upload-artifact@v4
         with:
           name: python-linux-${{ matrix.arch }}-${{ inputs.python_version }}
           path: ./python*.zip
 
       - name: Upload artifacts
+        if: ${{ always() && matrix.arch && inputs.debug }}
         uses: actions/upload-artifact@v4
-        if: ${{ always() && inputs.debug }}
         with:
           name: build-python-linux-${{ matrix.arch }}-${{ inputs.python_version }}
           path: ./*python*.tar.gz
 
       - name: Test python in clean environment
+        if: ${{ matrix.arch }}
         uses: addnab/docker-run-action@v3
         with:
-          image: ${{ matrix.image }}
+          image: ${{ steps.parse_image.outputs.image }}
           options: -v ${{ github.workspace }}:/work --workdir /tmp
           shell: bash
           run: |
@@ -113,6 +136,7 @@ jobs:
 
   build_windows:
     name: Windows ${{ inputs.python_version }} x86_64 (build)
+    if: ${{ contains(inputs.platforms, 'windows') }}
     runs-on: windows-latest
 
     steps:
@@ -138,6 +162,10 @@ jobs:
           set -ex
           ./scripts/build_windows.sh x86_64 ${{ inputs.python_version }}
 
+      - name: Interactive debugging
+        uses: fawazahmed0/action-debug@v2
+        if: ${{ always() && inputs.debug_interactive }}
+
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
@@ -179,6 +207,7 @@ jobs:
 
   build_macos:
     name: MacOS ${{ inputs.python_version }} universal2 (build)
+    if: ${{ contains(inputs.platforms, 'macos') }}
     runs-on: macos-latest
 
     steps:
@@ -197,6 +226,10 @@ jobs:
           set -ex
           ./scripts/build_macos.sh universal2 ${{ inputs.python_version }}
 
+      - name: Interactive debugging
+        uses: fawazahmed0/action-debug@v2
+        if: ${{ always() && inputs.debug_interactive }}
+
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
diff --git a/.github/workflows/build_python_on_branch.yml b/.github/workflows/build_python_on_branch.yml
index 7de63c03..6d688792 100644
--- a/.github/workflows/build_python_on_branch.yml
+++ b/.github/workflows/build_python_on_branch.yml
@@ -24,10 +24,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python_version: [ 3.9.18, 3.10.13 ]
+        python_version: [ 3.9.18, 3.10.13, 3.11.7 ]
     uses: ./.github/workflows/build_python.yml
     with:
       python_version: ${{ matrix.python_version }}
       run_tests: ${{ inputs.run_tests || false }}
       debug: ${{ inputs.debug || false }}
-      verbose: ${{ inputs.verbose || false }}
\ No newline at end of file
+      verbose: ${{ inputs.verbose || false }}
+      platforms: "linux-x86_64,linux-aarch64,linux-i386,linux-arm,linux-riscv64,macos,windows"
diff --git a/.github/workflows/release_python.yml b/.github/workflows/release_python.yml
index 5dbd1bf4..8013e40c 100644
--- a/.github/workflows/release_python.yml
+++ b/.github/workflows/release_python.yml
@@ -26,6 +26,7 @@ jobs:
     uses: ./.github/workflows/build_python.yml
     with:
       python_version: ${{ inputs.python_version }}
+      platforms: "linux-x86_64,linux-aarch64,linux-i386,linux-arm,linux-riscv64,macos,windows"
 
   publish:
     name: Publish ${{ inputs.python_version }}
diff --git a/scripts/build_linux_zig.sh b/scripts/build_linux_zig.sh
index 6b0f7e4d..5b9607cd 100755
--- a/scripts/build_linux_zig.sh
+++ b/scripts/build_linux_zig.sh
@@ -449,7 +449,7 @@ cd tcl*/unix
 LDFLAGS="${LDFLAGS} -lxml2" ./configure --disable-shared --host=${CHOST} --prefix=${DEPSDIR}
 make -j4
 make install
-cd .. 
+cd ..
 install_license ./license.terms
 
 echo "::endgroup::"
@@ -464,7 +464,7 @@ cd tk*/unix
 LDFLAGS="${LDFLAGS} -lxml2" ./configure --disable-shared --host=${CHOST} --prefix=${DEPSDIR}
 make -j4
 make install
-cd .. 
+cd ..
 install_license ./license.terms
 
 echo "::endgroup::"
@@ -501,7 +501,7 @@ if [[ "${ARCH}" == "arm" || "${ARCH}" == "aarch64" || "${ARCH}" == "riscv64" ]];
   CFLAGS="-static-libgcc"
 fi
 
-wget --no-verbose -O portable-python-cmake-buildsystem.tar.gz https://github.com/bjia56/portable-python-cmake-buildsystem/tarball/portable-python
+wget --no-verbose -O portable-python-cmake-buildsystem.tar.gz https://github.com/bjia56/portable-python-cmake-buildsystem/tarball/${CMAKE_BUILDSYSTEM_BRANCH}
 tar -xf portable-python-cmake-buildsystem.tar.gz
 rm *.tar.gz
 mv *portable-python-cmake-buildsystem* portable-python-cmake-buildsystem
@@ -513,7 +513,6 @@ LDFLAGS="${LDFLAGS} -lfontconfig -lfreetype" CFLAGS="${CFLAGS}" cmake \
   -DCMAKE_SYSTEM_PROCESSOR=${ARCH} \
   -DCMAKE_CROSSCOMPILING_EMULATOR=${WORKDIR}/scripts/qemu_${ARCH}_interpreter \
   -DCMAKE_IGNORE_PATH=/usr/include \
-  -DCMAKE_C_STANDARD=99 \
   -DPYTHON_VERSION=${PYTHON_FULL_VER} \
   -DCMAKE_BUILD_TYPE:STRING=Release \
   -DCMAKE_INSTALL_PREFIX:PATH=${BUILDDIR}/python-install \
@@ -545,6 +544,7 @@ LDFLAGS="${LDFLAGS} -lfontconfig -lfreetype" CFLAGS="${CFLAGS}" cmake \
   -DGDBM_LIBRARY:FILEPATH=${DEPSDIR}/lib/libgdbm.a \
   -DGDBM_COMPAT_LIBRARY:FILEPATH=${DEPSDIR}/lib/libgdbm_compat.a \
   -DNDBM_TAG=NDBM \
+  -DNDBM_USE=NDBM \
   -DTK_INCLUDE_PATH:FILEPATH=${DEPSDIR}/include/tk.h \
   -DTK_LIBRARY:FILEPATH=${DEPSDIR}/lib/libtk8.6.a \
   -DTCL_INCLUDE_PATH:FILEPATH=${DEPSDIR}/include/tcl.h \
diff --git a/scripts/build_macos.sh b/scripts/build_macos.sh
index d187f25b..b09603e3 100755
--- a/scripts/build_macos.sh
+++ b/scripts/build_macos.sh
@@ -16,7 +16,7 @@ cd ${BUILDDIR}
 
 export MACOSX_DEPLOYMENT_TARGET=10.5
 
-git clone https://github.com/bjia56/portable-python-cmake-buildsystem.git --branch portable-python --single-branch --depth 1
+git clone https://github.com/bjia56/portable-python-cmake-buildsystem.git --branch ${CMAKE_BUILDSYSTEM_BRANCH} --single-branch --depth 1
 
 echo "::endgroup::"
 ###########
@@ -144,7 +144,7 @@ download_verify_extract expat-2.5.0.tar.gz
 mkdir ${DEPSDIR}/expat
 cd expat*
 CC=clang CFLAGS="-arch x86_64 -arch arm64" ./configure --disable-shared --prefix=${DEPSDIR}/expat
-make -j4
+make -j${NPROC}
 make install
 install_license
 
@@ -186,6 +186,8 @@ echo "::endgroup::"
 echo "::group::Build"
 cd ${BUILDDIR}
 
+# TODO: build TCL
+
 mkdir python-build
 mkdir python-install
 cd python-build
@@ -194,7 +196,6 @@ cmake \
   -G "Unix Makefiles" \
   "-DCMAKE_OSX_ARCHITECTURES=arm64;x86_64" \
   -DCMAKE_OSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET} \
-  -DCMAKE_C_STANDARD=99 \
   -DPYTHON_VERSION=${PYTHON_FULL_VER} \
   -DCMAKE_BUILD_TYPE:STRING=Release \
   -DCMAKE_INSTALL_PREFIX:PATH=${BUILDDIR}/python-install \
@@ -205,6 +206,7 @@ cmake \
   -DINSTALL_MANUAL=OFF \
   -DOPENSSL_ROOT_DIR:PATH=${DEPSDIR}/openssl \
   -DUSE_SYSTEM_EXPAT=OFF \
+  -DUSE_SYSTEM_TCL=OFF \
   -DEXPAT_INCLUDE_DIRS:PATH=${DEPSDIR}/expat/include \
   -DEXPAT_LIBRARIES:FILEPATH=${DEPSDIR}/expat/lib/libexpat.a \
   -DSQLite3_INCLUDE_DIR:PATH=${DEPSDIR}/sqlite3/include \
diff --git a/scripts/build_windows.sh b/scripts/build_windows.sh
index 36b21cb6..23f94af4 100755
--- a/scripts/build_windows.sh
+++ b/scripts/build_windows.sh
@@ -10,7 +10,7 @@ source ${SCRIPT_DIR}/utils.sh
 echo "::group::Initialize"
 cd ${BUILDDIR}
 
-git clone https://github.com/bjia56/portable-python-cmake-buildsystem.git --branch portable-python --single-branch --depth 1
+git clone https://github.com/bjia56/portable-python-cmake-buildsystem.git --branch ${CMAKE_BUILDSYSTEM_BRANCH} --single-branch --depth 1
 
 echo "::endgroup::"
 ###########
@@ -138,7 +138,6 @@ cd python-build
 cmake \
   "${cmake_verbose_flags[@]}" \
   -G "Visual Studio 17 2022" -A x64 \
-  -DCMAKE_C_STANDARD=99 \
   -DPYTHON_VERSION=${PYTHON_FULL_VER} \
   -DCMAKE_BUILD_TYPE:STRING=Release \
   -DCMAKE_INSTALL_PREFIX:PATH=${BUILDDIR}/python-install \
diff --git a/scripts/utils.sh b/scripts/utils.sh
index 2187d3d8..ffa0bbf9 100644
--- a/scripts/utils.sh
+++ b/scripts/utils.sh
@@ -2,6 +2,7 @@
 
 set -e
 
+CMAKE_BUILDSYSTEM_BRANCH="portable-python"
 SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
 
 function verify_checksum () {