diff --git a/kanta/__main__.py b/kanta/__main__.py
index f715b83..b461b87 100644
--- a/kanta/__main__.py
+++ b/kanta/__main__.py
@@ -199,18 +199,20 @@ def _format_size(n: int) -> str:
 
 def _find_venv_site_packages(start: Path) -> list[Path]:
     """Return site-packages dirs of ``.venv`` directories from *start* to parents."""
+    py_dir = f"python{sys.version_info.major}.{sys.version_info.minor}"
     found: list[Path] = []
     for parent in [start, *start.parents]:
         venv = parent / ".venv"
         if not venv.is_dir():
             continue
-        for site_packages in venv.glob("lib/python*/site-packages"):
+        site_packages = venv / "lib" / py_dir / "site-packages"
+        if site_packages.is_dir():
             found.append(site_packages)
-            break
-        else:
-            win_site = venv / "Lib" / "site-packages"
-            if win_site.is_dir():
-                found.append(win_site)
+            continue
+        # Windows layout
+        win_site = venv / "Lib" / "site-packages"
+        if win_site.is_dir():
+            found.append(win_site)
     return found
 
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 54c133e..405f182 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -51,6 +51,25 @@ def test_extra_import_paths_are_temporary(tmp_path, monkeypatch):
     assert sys.path == before
 
 
+def test_extra_import_paths_ignores_other_python_versions(tmp_path, monkeypatch):
+    """Only the site-packages for the running Python version is picked up."""
+    current_site = (
+        tmp_path
+        / ".venv"
+        / "lib"
+        / f"python{sys.version_info.major}.{sys.version_info.minor}"
+        / "site-packages"
+    )
+    other_site = tmp_path / ".venv" / "lib" / "python9.9" / "site-packages"
+    current_site.mkdir(parents=True)
+    other_site.mkdir(parents=True)
+
+    monkeypatch.chdir(tmp_path)
+    with _extra_import_paths():
+        assert str(current_site) in sys.path
+        assert str(other_site) not in sys.path
+
+
 def test_cli_snapshot_line_format(tmp_path, capsys):
     """Snapshot lines are timestamped and colored with metadata."""
     path = tmp_path / "test.kantadb"