diff --git a/.github/requirements.txt b/.github/requirements.txt
index d240ac8..87127dd 100644
--- a/.github/requirements.txt
+++ b/.github/requirements.txt
@@ -1,7 +1,8 @@
-PyYAML >=5.4
+PyYAML >=5.1
 distutils-pytest
-lark-parser
+git-props
+lark
 pytest >=3.6.0
 pytest-dependency >=0.2
 python-dateutil
-setuptools_scm
+setuptools
diff --git a/.gitignore b/.gitignore
index 02d5097..eb7160f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,5 @@ __pycache__/
 /.env
 /MANIFEST
 /_meta.py
-/archive/__init__.py
 /build/
 /dist/
diff --git a/CHANGES.rst b/CHANGES.rst
index 60ef3bc..6ee0380 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -25,12 +25,13 @@ Bug fixes and minor changes
 Internal changes
 ----------------
 
-+ `#74`_: Review build tool chain.
++ `#74`_, `#80`_: Review build tool chain.
 
 .. _#74: https://github.com/RKrahl/archive-tools/pull/74
 .. _#75: https://github.com/RKrahl/archive-tools/pull/75
 .. _#76: https://github.com/RKrahl/archive-tools/issues/76
 .. _#77: https://github.com/RKrahl/archive-tools/pull/77
+.. _#80: https://github.com/RKrahl/archive-tools/pull/80
 
 
 0.6 (2021-12-12)
diff --git a/Makefile b/Makefile
index e56bf56..18caece 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,6 @@ clean:
 
 distclean: clean
 	rm -f MANIFEST _meta.py
-	rm -f archive/__init__.py
 	rm -rf dist
 	rm -rf tests/.pytest_cache
 	$(MAKE) -C doc distclean
diff --git a/README.rst b/README.rst
index d5f9051..2256cfd 100644
--- a/README.rst
+++ b/README.rst
@@ -60,7 +60,7 @@ Required library packages:
 
 + `packaging`_
 
-+ `lark-parser`_
++ `lark`_
 
   Required for the `backup-tool.py` script.
 
@@ -80,13 +80,13 @@ Optional library packages:
   - the `--mtime` argument to `archive-tool.py find` recognizes a
     reduced set of date formats.
 
-+ `setuptools_scm`_
++ `git-props`_
 
-  The version number is managed using this package.  All source
-  distributions add a static text file with the version number and
-  fall back using that if `setuptools_scm` is not available.  So this
-  package is only needed to build out of the plain development source
-  tree as cloned from GitHub.
+  This package is used to extract some metadata such as the version
+  number out of git, the version control system.  All releases embed
+  that metadata in the distribution.  So this package is only needed
+  to build out of the plain development source tree as cloned from
+  GitHub, but not to build a release distribution.
 
 + `pytest`_ >= 3.0
 
@@ -120,10 +120,10 @@ permissions and limitations under the License.
 .. _PyPI site: https://pypi.org/project/archive-tools/
 .. _PyYAML: https://pypi.org/project/PyYAML/
 .. _packaging: https://github.com/pypa/packaging/
-.. _lark-parser: https://github.com/lark-parser/lark
+.. _lark: https://github.com/lark-parser/lark
 .. _imapclient: https://github.com/mjs/imapclient/
 .. _python-dateutil: https://dateutil.readthedocs.io/en/stable/
-.. _setuptools_scm: https://github.com/pypa/setuptools_scm/
+.. _git-props: https://github.com/RKrahl/git-props
 .. _pytest: https://pytest.org/
 .. _distutils-pytest: https://github.com/RKrahl/distutils-pytest
 .. _pytest-dependency: https://pypi.python.org/pypi/pytest_dependency/
diff --git a/python-archive-tools.spec b/python-archive-tools.spec
index dd56c41..331ce6b 100644
--- a/python-archive-tools.spec
+++ b/python-archive-tools.spec
@@ -1,32 +1,41 @@
 %bcond_without tests
 %global distname archive-tools
 
-Name:		python3-%{distname}
+%if 0%{?sle_version} >= 150500
+%global pythons python3 python311
+%else
+%{?!python_module:%define python_module() python3-%{**}}
+%define skip_python2 1
+%endif
+
+Name:		python-%{distname}
 Version:	$version
 Release:	0
-Url:		$url
 Summary:	$description
 License:	Apache-2.0
+URL:		$url
 Group:		Development/Libraries/Python
-Source:		%{distname}-%{version}.tar.gz
+Source:		https://github.com/RKrahl/archive-tools/releases/download/%{version}/%{distname}-%{version}.tar.gz
+BuildRequires:	%{python_module base >= 3.6}
+BuildRequires:	%{python_module setuptools}
 BuildRequires:	fdupes
-BuildRequires:	python3-base >= 3.6
-BuildRequires:	python3-setuptools
+BuildRequires:	python-rpm-macros
 %if %{with tests}
-BuildRequires:	python3-PyYAML
-BuildRequires:	python3-lark-parser
-BuildRequires:	python3-distutils-pytest
-BuildRequires:	python3-packaging
-BuildRequires:	python3-pytest-dependency >= 0.2
-BuildRequires:	python3-pytest >= 3.0
+BuildRequires:	%{python_module PyYAML}
+BuildRequires:	%{python_module lark-parser}
+BuildRequires:	%{python_module distutils-pytest}
+BuildRequires:	%{python_module packaging}
+BuildRequires:	%{python_module pytest >= 3.0}
+BuildRequires:	%{python_module pytest-dependency >= 0.2}
+BuildRequires:	%{python_module python-dateutil}
 %endif
-Requires:	python3-PyYAML
-Requires:	python3-lark-parser
-Requires:	python3-packaging
-Recommends:	python3-IMAPClient
-Recommends:	python3-python-dateutil
+Requires:	python-PyYAML
+Requires:	python-lark-parser
+Requires:	python-packaging
+Recommends:	python-IMAPClient
+Recommends:	python-python-dateutil
 BuildArch:	noarch
-BuildRoot:	%{_tmppath}/%{name}-%{version}-build
+%python_subpackages
 
 %description
 $long_description
@@ -37,30 +46,29 @@ $long_description
 
 
 %build
-python3 setup.py build
+%python_build
 
 
 %install
-python3 setup.py install --optimize=1 --prefix=%{_prefix} --root=%{buildroot}
+%python_install
 for f in `ls %{buildroot}%{_bindir}`
 do
     mv %{buildroot}%{_bindir}/$$f %{buildroot}%{_bindir}/$${f%%.py}
 done
-%fdupes %{buildroot}
+%fdupes %{buildroot}%{python_sitelib}
 
 
 %if %{with tests}
 %check
-python3 setup.py test
+%python_expand $$python setup.py test
 %endif
 
 
-%files
-%defattr(-,root,root)
-%doc README.rst CHANGES.rst
+%files %{python_files}
 %license LICENSE.txt
+%doc README.rst CHANGES.rst
 %config(noreplace) %{_sysconfdir}/backup.cfg
-%{python3_sitelib}/*
+%{python_sitelib}/*
 %{_bindir}/*
 
 
diff --git a/setup.py b/setup.py
index 34347de..615ce48 100644
--- a/setup.py
+++ b/setup.py
@@ -1,29 +1,9 @@
-#! /usr/bin/python
 """Tools for managing archives
 
 This package provides tools for managing archives.  An archive in
 terms of this package is a (compressed) tar archive file with some
 embedded metadata on the included files.  This metadata include the
 name, file stats, and checksums of the file.
-
-The package provides a command line tool to enable the following
-tasks:
-
-+ Create an archive, takes a list of files to include in the archive
-  as input.
-
-+ Check the integrity and consistency of an archive.
-
-+ List the contents of the archive.
-
-+ Display details on a file in an archive.
-
-+ Given a list of files as input, list those files that are either not
-  in the archive or where the file in the archive differs.
-
-All tasks providing information on an archive take this information
-from the embedded metadata.  Retrieving this metadata does not require
-reading through the compressed tar archive.
 """
 
 import setuptools
@@ -40,15 +20,15 @@
 except (ImportError, AttributeError):
     cmdclass = dict()
 try:
-    import setuptools_scm
-    version = setuptools_scm.get_version()
+    import gitprops
+    release = str(gitprops.get_last_release())
+    version = str(gitprops.get_version())
 except (ImportError, LookupError):
     try:
-        import _meta
-        version = _meta.__version__
+        from _meta import release, version
     except ImportError:
         log.warn("warning: cannot determine version number")
-        version = "UNKNOWN"
+        release = version = "UNKNOWN"
 
 docstring = __doc__
 
@@ -57,43 +37,24 @@ class meta(setuptools.Command):
 
     description = "generate meta files"
     user_options = []
-    init_template = '''"""%(doc)s"""
-
-__version__ = "%(version)s"
-
-from archive.archive import Archive
-from archive.exception import *
-'''
     meta_template = '''
-__version__ = "%(version)s"
+release = "%(release)s"
+version = "%(version)s"
 '''
 
     def initialize_options(self):
-        self.package_dir = None
+        pass
 
     def finalize_options(self):
-        self.package_dir = {}
-        if self.distribution.package_dir:
-            for name, path in self.distribution.package_dir.items():
-                self.package_dir[name] = convert_path(path)
+        pass
 
     def run(self):
         version = self.distribution.get_version()
         log.info("version: %s", version)
         values = {
+            'release': release,
             'version': version,
-            'doc': docstring,
         }
-        try:
-            pkgname = self.distribution.packages[0]
-        except IndexError:
-            log.warn("warning: no package defined")
-        else:
-            pkgdir = Path(self.package_dir.get(pkgname, pkgname))
-            if not pkgdir.is_dir():
-                pkgdir.mkdir()
-            with (pkgdir / "__init__.py").open("wt") as f:
-                print(self.init_template % values, file=f)
         with Path("_meta.py").open("wt") as f:
             print(self.meta_template % values, file=f)
 
@@ -121,6 +82,9 @@ class build_py(setuptools.command.build_py.build_py):
     def run(self):
         self.run_command('meta')
         super().run()
+        package = self.distribution.packages[0].split('.')
+        outfile = self.get_module_outfile(self.build_lib, package, "_meta")
+        self.copy_file("_meta.py", outfile, preserve_mode=0)
 
 
 with Path("README.rst").open("rt", encoding="utf8") as f:
@@ -153,11 +117,13 @@ def run(self):
     ],
     project_urls = dict(
         Source="https://github.com/RKrahl/archive-tools",
-        Download="https://github.com/RKrahl/archive-tools/releases/latest",
+        Download=("https://github.com/RKrahl/archive-tools/releases/%s/"
+                  % release),
     ),
     packages = ["archive", "archive.cli", "archive.bt"],
+    package_dir = {"": "src"},
     python_requires = ">=3.6",
-    install_requires = ["PyYAML", "packaging", "lark"],
+    install_requires = ["setuptools", "PyYAML", "packaging", "lark"],
     scripts = ["scripts/archive-tool.py", "scripts/backup-tool.py",
                "scripts/imap-to-archive.py"],
     data_files = [("/etc", ["etc/backup.cfg"])],
diff --git a/src/archive/__init__.py b/src/archive/__init__.py
new file mode 100644
index 0000000..0022c66
--- /dev/null
+++ b/src/archive/__init__.py
@@ -0,0 +1,11 @@
+"""Tools for managing archives
+
+This package provides tools for managing archives.  An archive in
+terms of this package is a (compressed) tar archive file with some
+embedded metadata on the included files.  This metadata include the
+name, file stats, and checksums of the file.
+"""
+
+from ._meta import version as __version__
+from .archive import Archive
+from .exception import *
diff --git a/archive/archive.py b/src/archive/archive.py
similarity index 99%
rename from archive/archive.py
rename to src/archive/archive.py
index 76366c3..66d4d3c 100644
--- a/archive/archive.py
+++ b/src/archive/archive.py
@@ -10,9 +10,9 @@
 import sys
 import tarfile
 import tempfile
-from archive.manifest import Manifest
-from archive.exception import *
-from archive.tools import checksum
+from .manifest import Manifest
+from .exception import *
+from .tools import checksum
 
 def _is_normalized(p):
     """Check if the path is normalized.
diff --git a/archive/bt/__init__.py b/src/archive/bt/__init__.py
similarity index 100%
rename from archive/bt/__init__.py
rename to src/archive/bt/__init__.py
diff --git a/archive/bt/config.py b/src/archive/bt/config.py
similarity index 100%
rename from archive/bt/config.py
rename to src/archive/bt/config.py
diff --git a/archive/bt/create.py b/src/archive/bt/create.py
similarity index 100%
rename from archive/bt/create.py
rename to src/archive/bt/create.py
diff --git a/archive/bt/index.py b/src/archive/bt/index.py
similarity index 100%
rename from archive/bt/index.py
rename to src/archive/bt/index.py
diff --git a/archive/bt/schedule.py b/src/archive/bt/schedule.py
similarity index 100%
rename from archive/bt/schedule.py
rename to src/archive/bt/schedule.py
diff --git a/archive/cli/__init__.py b/src/archive/cli/__init__.py
similarity index 100%
rename from archive/cli/__init__.py
rename to src/archive/cli/__init__.py
diff --git a/archive/cli/check.py b/src/archive/cli/check.py
similarity index 100%
rename from archive/cli/check.py
rename to src/archive/cli/check.py
diff --git a/archive/cli/create.py b/src/archive/cli/create.py
similarity index 100%
rename from archive/cli/create.py
rename to src/archive/cli/create.py
diff --git a/archive/cli/diff.py b/src/archive/cli/diff.py
similarity index 100%
rename from archive/cli/diff.py
rename to src/archive/cli/diff.py
diff --git a/archive/cli/find.py b/src/archive/cli/find.py
similarity index 100%
rename from archive/cli/find.py
rename to src/archive/cli/find.py
diff --git a/archive/cli/info.py b/src/archive/cli/info.py
similarity index 100%
rename from archive/cli/info.py
rename to src/archive/cli/info.py
diff --git a/archive/cli/ls.py b/src/archive/cli/ls.py
similarity index 100%
rename from archive/cli/ls.py
rename to src/archive/cli/ls.py
diff --git a/archive/cli/verify.py b/src/archive/cli/verify.py
similarity index 100%
rename from archive/cli/verify.py
rename to src/archive/cli/verify.py
diff --git a/archive/config.py b/src/archive/config.py
similarity index 97%
rename from archive/config.py
rename to src/archive/config.py
index 41e1355..45d4f01 100644
--- a/archive/config.py
+++ b/src/archive/config.py
@@ -9,7 +9,7 @@
 
 from collections import ChainMap
 import configparser
-from archive.exception import ConfigError
+from .exception import ConfigError
 
 class Config(ChainMap):
 
diff --git a/archive/exception.py b/src/archive/exception.py
similarity index 100%
rename from archive/exception.py
rename to src/archive/exception.py
diff --git a/archive/index.py b/src/archive/index.py
similarity index 98%
rename from archive/index.py
rename to src/archive/index.py
index 615dec6..26aa916 100644
--- a/archive/index.py
+++ b/src/archive/index.py
@@ -4,8 +4,8 @@
 from collections.abc import Mapping, Sequence
 from pathlib import Path
 import yaml
-from archive.archive import Archive
-from archive.tools import Version, parse_date
+from .archive import Archive
+from .tools import Version, parse_date
 
 
 class IndexItem:
diff --git a/archive/mailarchive.py b/src/archive/mailarchive.py
similarity index 96%
rename from archive/mailarchive.py
rename to src/archive/mailarchive.py
index 1dcc3bf..81c22e1 100644
--- a/archive/mailarchive.py
+++ b/src/archive/mailarchive.py
@@ -3,8 +3,8 @@
 from pathlib import Path
 from tempfile import TemporaryDirectory, TemporaryFile
 import yaml
-from archive import Archive
-from archive.tools import Version, now_str, parse_date, tmp_chdir, tmp_umask
+from .archive import Archive
+from .tools import Version, now_str, parse_date, tmp_chdir, tmp_umask
 
 
 class MailIndex(list):
diff --git a/archive/manifest.py b/src/archive/manifest.py
similarity index 98%
rename from archive/manifest.py
rename to src/archive/manifest.py
index 697c531..5d4310b 100644
--- a/archive/manifest.py
+++ b/src/archive/manifest.py
@@ -13,9 +13,8 @@
 import warnings
 import yaml
 import archive
-from archive.exception import ArchiveInvalidTypeError, ArchiveWarning
-from archive.tools import (Version, now_str, parse_date,
-                           checksum, mode_ft, ft_mode)
+from .exception import ArchiveInvalidTypeError, ArchiveWarning
+from .tools import Version, now_str, parse_date, checksum, mode_ft, ft_mode
 
 
 class DiffStatus(Enum):
diff --git a/archive/tools.py b/src/archive/tools.py
similarity index 100%
rename from archive/tools.py
rename to src/archive/tools.py