diff --git a/.gitignore b/.gitignore
index 2c28d02..3e725eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,5 @@
 .idea
 .vscode
-pyquda/src/*.c
-pyquda/src/*.cpp
 *.so
 .cache
 __pycache__
@@ -14,10 +12,12 @@ script
 logs
 DATA
 
-# autogenerated wrapper
+# autogenerated files
 pyquda/src/quda.pxd
 pyquda/src/pyquda.pyx
 pyquda/enum_quda.py
+pyquda/src/*.c
+pyquda/src/*.cpp
 
 # pycparser
 yacctab.py
diff --git a/MANIFEST.in b/MANIFEST.in
index 473c531..bf13f44 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,10 @@
+# .gitignore
+exclude pyquda/src/quda.pxd
+exclude pyquda/src/pyquda.pyx
+exclude pyquda/enum_quda.py
+exclude pyquda/src/*.c
+exclude pyquda/src/*.cpp
+
 exclude tests/*
 include pyquda_pyx.py
 include pycparser/LICENSE
diff --git a/pyquda/__init__.py b/pyquda/__init__.py
index 53344c3..61367ff 100644
--- a/pyquda/__init__.py
+++ b/pyquda/__init__.py
@@ -15,7 +15,7 @@ class SupportsWriteAndFlush(SupportsWrite[_T_contra], SupportsFlush, Protocol[_T
 
 from mpi4py import MPI
 
-__version__ = "0.5.6"
+__version__ = "0.6.0"
 from . import pyquda as quda
 from .field import LatticeInfo
 
diff --git a/setup.py b/setup.py
index c562f5c..2426289 100755
--- a/setup.py
+++ b/setup.py
@@ -1,17 +1,23 @@
 import os
-from distutils.core import Extension, setup
+import sys
+from setuptools import Extension, setup
 from Cython.Build import cythonize
 from pyquda_pyx import build_pyquda_pyx
 
-assert "QUDA_PATH" in os.environ, "QUDA_PATH environment is needed to link against libquda"
-quda_path = os.path.realpath(os.environ["QUDA_PATH"])
-build_pyquda_pyx(os.path.dirname(__file__), quda_path)
-if os.path.exists(os.path.join(quda_path, "lib", "libquda.so")):
+if "QUDA_PATH" in os.environ:
+    quda_path = os.path.realpath(os.environ["QUDA_PATH"])
+    build_pyquda_pyx(os.path.dirname(__file__), quda_path)
+    if os.path.exists(os.path.join(quda_path, "lib", "libquda.so")):
+        _STATIC = False
+    elif os.path.exists(os.path.join(quda_path, "lib", "libquda.a")):
+        _STATIC = True
+    else:
+        raise FileNotFoundError(f"Cannot find libquda.so or libquda.a in {os.path.join(quda_path, 'lib')}")
+elif "sdist" in sys.argv:
+    quda_path = ""
     _STATIC = False
-elif os.path.exists(os.path.join(quda_path, "lib", "libquda.a")):
-    _STATIC = True
 else:
-    raise RuntimeError(f"Cannot find libquda.so or libquda.a in {os.path.join(quda_path, 'lib')}")
+    raise EnvironmentError("QUDA_PATH environment is needed to link against libquda")
 
 extensions = cythonize(
     [