diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d3f9d94..9e76598 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,8 +21,12 @@ jobs:
 
     strategy:
       matrix:
+        # 2023-09 тесты 3.12.0-rc.2 не проходили на windows-latest,
+        # поэтому пока отключены
+
         os: [ ubuntu-latest, macos-latest, windows-latest ]
-        python-version: [ 3.7, 3.8, 3.9, '3.10', '3.11', '3.12' ]
+
+        python-version: [ 3.7, 3.8, 3.9, '3.10', '3.11' ]
 
     steps:
       - uses: actions/checkout@v4
diff --git a/README.md b/README.md
index 5677459..2af54c1 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![Generic badge](https://img.shields.io/badge/Maturity-Experimental-red.svg)
 ](#)
-[![Generic badge](https://img.shields.io/badge/Python-3.7..3.12-blue.svg)](#)
+[![Generic badge](https://img.shields.io/badge/Python-3.7–3.11-blue.svg)](#)
 [![Generic badge](https://img.shields.io/badge/OS-Linux%20|%20macOS%20|%20Windows-blue.svg)](#)
 
 # [dmk: dark matter keeper](https://github.com/rtmigo/dmk_py#readme)
diff --git a/dmk/_constants.py b/dmk/_constants.py
index 644b02d..2d2d391 100644
--- a/dmk/_constants.py
+++ b/dmk/_constants.py
@@ -4,3 +4,4 @@
 
 __version__ = "0.7.0"
 __copyright__ = "2021-2022 Artem IG <github.com/rtmigo>"
+__build_timestamp__ = "0000-00-00 00:00"
diff --git a/do.py b/do.py
new file mode 100644
index 0000000..cce3cc9
--- /dev/null
+++ b/do.py
@@ -0,0 +1,112 @@
+import datetime
+import os
+import re
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+import PyInstaller.__main__ as compile
+import click
+import neatest
+from chkpkg import Package
+
+
+@click.group()
+def app():
+    pass
+
+
+@app.command()
+def test():
+    _test()
+
+
+def _test():
+    neatest.run(warnings=neatest.Warnings.fail)
+
+
+@app.command()
+def test_pkg():
+    with Package() as pkg:
+        pkg.run_shell_code('dmk --version')
+    print("\nPackage is OK!")
+
+
+@app.command()
+def run():
+    subprocess.call([sys.executable, "_run.py"])
+
+
+@app.command()
+def lint():
+    _lint()
+
+
+def _lint():
+    print("Running mypy...")
+    if subprocess.call(['mypy', 'dmk',
+                        '--ignore-missing-imports']) != 0:
+        exit(1)
+
+
+# def _get_git_commit():
+#     return subprocess.check_output("git log --pretty=format:'%h' -n 1".split())
+
+
+def _replace_build_date(fn: Path):
+    now = datetime.datetime.now().isoformat(sep=" ", timespec="seconds")
+    text = fn.read_text()
+    new_text = re.sub(
+        r'__build_timestamp__.+',
+        f'__build_timestamp__ = "{now}"',
+        text)
+    print(new_text)
+    assert new_text != text, "timestamp not changed"
+    fn.write_text(new_text)
+
+
+# def _replace_git_commit(fn: Path):
+#     now = datetime.datetime.now().isoformat(sep=" ", timespec="seconds")
+#     text = fn.read_text()
+#     text = re.sub(
+#         r'__prev_commit__.+$',
+#         f'__prev_prev_commit__ = "{now}"',
+#         text)
+#     print(text)
+#     fn.write_text(text)
+
+
+@app.command()
+def install():
+    """Build PyInstaller executable and copy it to ~/.local/bin"""
+    name = "dmk"
+    project_dir = Path(__file__).parent
+
+    _test()
+    _lint()
+
+    _replace_build_date(Path("dmk/_constants.py"))
+    # exit()
+
+    compile.run([
+        "--clean", "--onefile", "-y",
+        "--collect-all", "dmk",
+        "--name", name, "_run.py"
+    ])
+
+    exe = project_dir / "dist" / name
+    print(f"Exe size: {exe.stat().st_size / 1024 / 1024:.0f} MiB")
+
+    os.remove(project_dir / "dmk.spec")
+    shutil.rmtree(project_dir / "build")
+    target = Path(os.path.expanduser("~/.local/bin")) / name
+    if target.parent.exists():
+        print(f"Copying to {target}")
+        shutil.move(exe, target)
+    else:
+        print(f"{target.parent} does not exist")
+
+
+if __name__ == "__main__":
+    app()