diff --git a/.gitignore b/.gitignore
index a81c8ee..7fcec70 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,8 @@
+src/soxr/_csoxr_version.c
+src/soxr/_version.py
+
+
+### Python ###
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
@@ -94,7 +99,22 @@ ipython_config.py
 #   install all needed dependencies.
 #Pipfile.lock
 
-# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
 __pypackages__/
 
 # Celery stuff
@@ -136,3 +156,20 @@ dmypy.json
 
 # Cython debug symbols
 cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
diff --git a/BUILDING.md b/BUILDING.md
index b9abbe0..cbfa422 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -23,11 +23,18 @@ python -m build
 libsoxr should be installed before building.  
 (e.g. `sudo apt install libsoxr-dev`)
 ```
-python -m build -C=--global-option=--use-system-libsoxr
+python -m build -C--build-option=--use-system-libsoxr
 ```
 It will link libsoxr dynamically and libsoxr won't bundled in the wheel package.
 
 
+## Install
+Install built .whl package(not .tar.gz sdist).
+```
+pip install dist/soxr-[...].whl
+```
+
+
 ## Test
 ```
 # Install dependencies
diff --git a/MANIFEST.in b/MANIFEST.in
index 64e7c8b..42c55a5 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,6 +2,7 @@ include libsoxr/src/*.c
 include libsoxr/src/*.h
 include libsoxr/COPYING.LGPL
 include libsoxr/LICENCE
+include src/soxr/csoxr_version.c
 include src/soxr/*.h
 include src/soxr/*.pxd
 include src/soxr/*.py
diff --git a/pyproject.toml b/pyproject.toml
index 26c966b..77c7184 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,10 +3,10 @@ requires = [
     "setuptools>=42",
     "wheel",
     "Cython>=3.0a7",
-    "setuptools_scm[toml]>=3.4",
+    "setuptools_scm[toml]>=6.2",
     "oldest-supported-numpy"
 ]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
-write_to = "src/soxr/version.py"
+write_to = "src/soxr/_version.py"
diff --git a/setup.py b/setup.py
index faea915..c5a67c0 100644
--- a/setup.py
+++ b/setup.py
@@ -1,14 +1,23 @@
+"""
+Python-SoXR setup.py for Cython build
+
+Please refer to BUILDING.md for building instructions.
+Do not run setup.py directly for the build process.
+"""
+
+import logging
+import subprocess
 import sys
 import sysconfig
 
-from setuptools import setup, Extension
-
 from distutils.ccompiler import get_default_compiler
+from setuptools import setup, Extension
+from setuptools.command.sdist import sdist
 
 
 SYS_LIBSOXR = False
 
-# python -m build -C=--global-option=--use-system-libsoxr
+# python -m build -C=--build-option=--use-system-libsoxr
 if '--use-system-libsoxr' in sys.argv:
     sys.argv.remove('--use-system-libsoxr')
     SYS_LIBSOXR = True
@@ -28,7 +37,37 @@ def include_dirs(self):
     def include_dirs(self, dirs):
         self._include = dirs
 
-src_libsoxr = [
+
+def get_git_version(cwd=''):
+    try:
+        result = subprocess.run(
+            ['git', 'describe', '--tags', '--always', '--dirty'],
+            cwd=cwd, capture_output=True, check=True, text=True)
+
+        ver = result.stdout.strip()
+        return ver
+    except Exception as e:
+        logging.warning(f'Error retrieving submodule version: {e}')
+    return 'unknown'
+
+
+CSOXR_VERSION_C = '''
+#include "csoxr_version.h"
+const char * libsoxr_version() { return "%s"; }
+'''
+
+
+class SDistBundledCommand(sdist):
+    def run(self):
+        ver = get_git_version('libsoxr')
+        with open(f'src/soxr/_csoxr_version.c', 'wt') as f:
+            f.write(CSOXR_VERSION_C % (ver))
+        logging.info(f'libsoxr version: {ver}')
+
+        super().run()
+
+
+src_static = [
     'libsoxr/src/soxr.c',
     'libsoxr/src/data-io.c',
     'libsoxr/src/dbesi0.c',
@@ -55,11 +94,16 @@ def include_dirs(self, dirs):
     # 'libsoxr/src/cr64s.c',
     # 'libsoxr/src/pffft64s.c',
     # 'libsoxr/src/util64s.c',
+
+    # Cython wrapper
+    'src/soxr/cysoxr.pyx',
+    'src/soxr/_csoxr_version.c',  # csoxr libsoxr_version()
 ]
 
-src = [
+src_dynamic = [
     # Cython wrapper
-    'src/soxr/cysoxr.pyx'
+    'src/soxr/cysoxr.pyx',
+    'src/soxr/csoxr_version.c',  # libsoxr soxr_version()
 ]
 
 compile_args = ['-DSOXR_LIB']
@@ -76,14 +120,14 @@ def include_dirs(self, dirs):
 extensions = [
     CySoxrExtension(
         "soxr.cysoxr",
-        src_libsoxr + src,
+        src_static,
         include_dirs=['libsoxr/src', 'src/soxr'],
         language="c",
         extra_compile_args=compile_args)
 ]
 
 extensions_dynamic = [
-    CySoxrExtension('soxr.cysoxr', src, language='c', libraries=['soxr'])
+    CySoxrExtension('soxr.cysoxr', src_dynamic, language='c', libraries=['soxr'])
 ]
 
 
@@ -91,10 +135,13 @@ def include_dirs(self, dirs):
     from Cython.Build import cythonize
 
     if SYS_LIBSOXR:
+        logging.info('Building Python-SoXR using system libsoxr...')
         setup(
             ext_modules=cythonize(extensions_dynamic, language_level='3'),
         )
     else:
+        logging.info('Building Python-SoXR using bundled libsoxr...')
         setup(
+            cmdclass={'sdist': SDistBundledCommand},
             ext_modules=cythonize(extensions, language_level='3'),
         )
diff --git a/src/soxr/__init__.py b/src/soxr/__init__.py
index afb01c4..8c5ca02 100644
--- a/src/soxr/__init__.py
+++ b/src/soxr/__init__.py
@@ -7,13 +7,12 @@
 
 import numpy as np
 
-from .cysoxr import CySoxr
-from .cysoxr import cysoxr_divide_proc
-from .cysoxr import cysoxr_oneshot
+from . import cysoxr
 from .cysoxr import QQ, LQ, MQ, HQ, VHQ
+from ._version import __version__
 
-from .version import version as __version__
 
+__libsoxr_version__ = cysoxr.libsoxr_version()
 
 # libsoxr locates memory per each channel.
 # Too much channels will cause memory error.
@@ -83,7 +82,7 @@ def __init__(self,
 
         q = _quality_to_enum(quality)
 
-        self._cysoxr = CySoxr(in_rate, out_rate, num_channels, self._type.type, q)
+        self._cysoxr = cysoxr.CySoxr(in_rate, out_rate, num_channels, self._type.type, q)
 
     def resample_chunk(self, x, last=False):
         """ Resample chunk with streaming resampler
@@ -157,14 +156,14 @@ def resample(x, in_rate: float, out_rate: float, quality='HQ'):
     x = np.ascontiguousarray(x)    # make array C-contiguous
 
     if x.ndim == 1:
-        y = cysoxr_divide_proc(in_rate, out_rate, x[:, np.newaxis], q)
+        y = cysoxr.cysoxr_divide_proc(in_rate, out_rate, x[:, np.newaxis], q)
         return np.squeeze(y, axis=1)
     elif x.ndim == 2:
         num_channels = x.shape[1]
         if num_channels < 1 or _CH_LIMIT < num_channels:
             raise ValueError(_CH_EXEED_ERR_STR.format(num_channels))
 
-        return cysoxr_divide_proc(in_rate, out_rate, x, q)
+        return cysoxr.cysoxr_divide_proc(in_rate, out_rate, x, q)
     else:
         raise ValueError('Input must be 1-D or 2-D array')
 
@@ -175,4 +174,4 @@ def _resample_oneshot(x, in_rate: float, out_rate: float, quality='HQ'):
     `soxr_oneshot()` becomes slow with long input.
     This function exists for test purpose.
     """
-    return cysoxr_oneshot(in_rate, out_rate, x, _quality_to_enum(quality))
+    return cysoxr.cysoxr_oneshot(in_rate, out_rate, x, _quality_to_enum(quality))
diff --git a/src/soxr/_csoxr_version.c b/src/soxr/_csoxr_version.c
new file mode 100644
index 0000000..a5785fa
--- /dev/null
+++ b/src/soxr/_csoxr_version.c
@@ -0,0 +1,5 @@
+#include "csoxr_version.h"
+
+const char * libsoxr_version() {
+    return "undefined";
+}
diff --git a/src/soxr/csoxr.pxd b/src/soxr/csoxr.pxd
index 8103c52..d3d0246 100644
--- a/src/soxr/csoxr.pxd
+++ b/src/soxr/csoxr.pxd
@@ -58,3 +58,7 @@ cdef extern from 'soxr.h':
     cdef unsigned long SOXR_VHQ
 
     cdef soxr_io_spec_t soxr_io_spec(soxr_datatype_t itype, soxr_datatype_t otype)
+
+
+cdef extern from 'csoxr_version.h':
+    cdef const char * libsoxr_version()
diff --git a/src/soxr/csoxr_version.c b/src/soxr/csoxr_version.c
new file mode 100644
index 0000000..7045381
--- /dev/null
+++ b/src/soxr/csoxr_version.c
@@ -0,0 +1,6 @@
+#include <soxr.h>
+#include "csoxr_version.h"
+
+const char * libsoxr_version() {
+    return soxr_version();
+}
diff --git a/src/soxr/csoxr_version.h b/src/soxr/csoxr_version.h
new file mode 100644
index 0000000..87d1951
--- /dev/null
+++ b/src/soxr/csoxr_version.h
@@ -0,0 +1 @@
+const char * libsoxr_version();
diff --git a/src/soxr/cysoxr.pyx b/src/soxr/cysoxr.pyx
index 85d61f2..f8f52f4 100644
--- a/src/soxr/cysoxr.pyx
+++ b/src/soxr/cysoxr.pyx
@@ -24,6 +24,10 @@ ctypedef fused datatype_t:
     cython.short
 
 
+cpdef str libsoxr_version():
+    return csoxr.libsoxr_version().decode('UTF-8')
+
+
 # NumPy scalar type to soxr_io_spec_t
 cdef csoxr.soxr_io_spec_t to_io_spec(type ntype):
     cdef csoxr.soxr_datatype_t io_type