diff --git a/.github/workflows/examples.yml b/.github/workflows/examples.yml
index 1aae6c0b..5825fd81 100644
--- a/.github/workflows/examples.yml
+++ b/.github/workflows/examples.yml
@@ -42,7 +42,7 @@ jobs:
         if: startsWith(matrix.os, 'macos')
         env:
           PIO_INSTALL_DEVPLATFORMS_OWNERNAMES: "platformio"
-          PIO_INSTALL_DEVPLATFORMS_IGNORE: "ststm8,infineonxmc,microchippic32,lattice_ice40"
+          PIO_INSTALL_DEVPLATFORMS_IGNORE: "ststm8,infineonxmc,microchippic32,lattice_ice40,gd32v"
         run: |
           df -h
           tox -e testexamples
diff --git a/HISTORY.rst b/HISTORY.rst
index e1073378..f0e541db 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -19,6 +19,7 @@ PlatformIO Core 5
 - Show a warning message about deprecated support for Python 2 and Python 3.5
 - Do not provide "intelliSenseMode" option when generating configuration for VSCode C/C++ extension
 - Fixed a "git-sh-setup: file not found" error when installing project dependencies from Git VCS (`issue #3740 <https://github.com/platformio/platformio-core/issues/3740>`_)
+- Fixed an issue with package publishing on Windows when Unix permissions are not preserved (`issue #3776 <https://github.com/platformio/platformio-core/issues/3776>`_)
 
 5.0.3 (2020-11-12)
 ~~~~~~~~~~~~~~~~~~
diff --git a/platformio/commands/package.py b/platformio/commands/package.py
index bda36570..0013d158 100644
--- a/platformio/commands/package.py
+++ b/platformio/commands/package.py
@@ -23,6 +23,7 @@ from platformio.clients.registry import RegistryClient
 from platformio.compat import ensure_python3
 from platformio.package.meta import PackageSpec, PackageType
 from platformio.package.pack import PackagePacker
+from platformio.package.unpack import FileUnpacker, TARArchiver
 
 
 def validate_datetime(ctx, param, value):  # pylint: disable=unused-argument
@@ -81,6 +82,17 @@ def package_pack(package, output):
 )
 def package_publish(package, owner, released_at, private, notify):
     assert ensure_python3()
+
+    # publish .tar.gz instantly without repacking
+    if not os.path.isdir(package) and isinstance(
+        FileUnpacker.new_archiver(package), TARArchiver
+    ):
+        response = RegistryClient().publish_package(
+            package, owner, released_at, private, notify
+        )
+        click.secho(response.get("message"), fg="green")
+        return
+
     with tempfile.TemporaryDirectory() as tmp_dir:  # pylint: disable=no-member
         with fs.cd(tmp_dir):
             p = PackagePacker(package)
diff --git a/platformio/package/unpack.py b/platformio/package/unpack.py
index 9956b46a..2913660d 100644
--- a/platformio/package/unpack.py
+++ b/platformio/package/unpack.py
@@ -134,27 +134,28 @@ class FileUnpacker(object):
         self.path = path
         self._archiver = None
 
-    def _init_archiver(self):
+    def __enter__(self):
+        self._archiver = self.new_archiver(self.path)
+        return self
+
+    def __exit__(self, *args):
+        if self._archiver:
+            self._archiver.close()
+
+    @staticmethod
+    def new_archiver(path):
         magic_map = {
             b"\x1f\x8b\x08": TARArchiver,
             b"\x42\x5a\x68": TARArchiver,
             b"\x50\x4b\x03\x04": ZIPArchiver,
         }
         magic_len = max(len(k) for k in magic_map)
-        with open(self.path, "rb") as fp:
+        with open(path, "rb") as fp:
             data = fp.read(magic_len)
             for magic, archiver in magic_map.items():
                 if data.startswith(magic):
-                    return archiver(self.path)
-        raise PackageException("Unknown archive type '%s'" % self.path)
-
-    def __enter__(self):
-        self._archiver = self._init_archiver()
-        return self
-
-    def __exit__(self, *args):
-        if self._archiver:
-            self._archiver.close()
+                    return archiver(path)
+        raise PackageException("Unknown archive type '%s'" % path)
 
     def unpack(
         self, dest_dir=None, with_progress=True, check_unpacked=True, silent=False