diff --git a/HISTORY.rst b/HISTORY.rst
index 2f435338..82981189 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -18,8 +18,8 @@ PlatformIO 2.0
   and allowed to `change default upload reset method <http://docs.platformio.org/en/latest/platforms/espressif.html#custom-reset-method>`_
   for Espressif development platform
   (`issue #444 <https://github.com/platformio/platformio/issues/444>`_)
-* Allowed to force output of color ANSI-codes even if the output is a ``pipe``
-  (not a ``tty``)
+* Allowed to force output of color ANSI-codes or to disable progress bar even
+  if the output is a ``pipe`` (not a ``tty``) using `Environment variables <http://docs.platformio.org/en/latest/envvars.html>`__
   (`issue #465 <https://github.com/platformio/platformio/issues/465>`_)
 * Set 1Mb SPIFFS for Espressif boards by default
   (`issue #458 <https://github.com/platformio/platformio/issues/458>`_)
diff --git a/docs/envvars.rst b/docs/envvars.rst
index f9f037da..f46784bd 100644
--- a/docs/envvars.rst
+++ b/docs/envvars.rst
@@ -34,16 +34,21 @@ operations/commands.
 PlatformIO handles ``CI`` variable which is setup by
 `Continuous Integration <http://en.wikipedia.org/wiki/Continuous_integration>`_
 (Travis, Circle and etc.) systems.
-Currently, PlatformIO uses it to disable prompts.
-
-In other words, ``CI=true`` automatically setup
-:envvar:`PLATFORMIO_SETTING_ENABLE_PROMPTS=false <PLATFORMIO_SETTING_ENABLE_PROMPTS>`.
+PlatformIO uses it to disable prompts and progress bars. In other words,
+``CI=true`` automatically setup :envvar:`PLATFORMIO_SETTING_ENABLE_PROMPTS` to
+``false`` and :envvar:`PLATFORMIO_DISABLE_PROGRESSBAR` to ``true``.
 
 .. envvar:: PLATFORMIO_FORCE_COLOR
 
 Force to output color ANSI-codes even if the output is a ``pipe`` (not a ``tty``).
 The possible values are ``true`` and ``false``. Default is ``PLATFORMIO_FORCE_COLOR=false``.
 
+.. envvar:: PLATFORMIO_DISABLE_PROGRESSBAR
+
+Disable progress bar for package/library downloader and uploader. This is
+useful when calling PlatformIO from subprocess and output is a ``pipe`` (not a ``tty``).
+The possible values are ``true`` and ``false``. Default is ``PLATFORMIO_DISABLE_PROGRESSBAR=false``.
+
 .. envvar:: PLATFORMIO_HOME_DIR
 
 Allows to override :ref:`projectconf` option :ref:`projectconf_pio_home_dir`.
diff --git a/platformio/__init__.py b/platformio/__init__.py
index 7197b8c1..6099e910 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -14,7 +14,7 @@
 
 import sys
 
-VERSION = (2, 8, "0.dev0")
+VERSION = (2, 8, "0.dev1")
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"
diff --git a/platformio/app.py b/platformio/app.py
index 8707f6cd..b7486f68 100644
--- a/platformio/app.py
+++ b/platformio/app.py
@@ -183,3 +183,10 @@ def get_session_var(name, default=None):
 def set_session_var(name, value):
     assert name in SESSION_VARS
     SESSION_VARS[name] = value
+
+
+def is_disabled_progressbar():
+    # tmp hook
+    if get_session_var("caller_id") == "atom":
+        return True
+    return is_ci() or getenv("PLATFORMIO_DISABLE_PROGRESSBAR") == "true"
diff --git a/platformio/builder/tools/piomisc.py b/platformio/builder/tools/piomisc.py
index 01f70265..2c141211 100644
--- a/platformio/builder/tools/piomisc.py
+++ b/platformio/builder/tools/piomisc.py
@@ -114,7 +114,10 @@ class InoToCPPConverter(object):
 def ConvertInoToCpp(env):
 
     def delete_tmpcpp_file(file_):
-        remove(file_)
+        try:
+            remove(file_)
+        except WindowsError:
+            pass
 
     ino_nodes = (env.Glob(join("$PROJECTSRC_DIR", "*.ino")) +
                  env.Glob(join("$PROJECTSRC_DIR", "*.pde")))
diff --git a/platformio/downloader.py b/platformio/downloader.py
index a64c1a5f..25e409ae 100644
--- a/platformio/downloader.py
+++ b/platformio/downloader.py
@@ -20,7 +20,7 @@ from time import mktime
 import click
 import requests
 
-from platformio import util
+from platformio import app, util
 from platformio.exception import (FDSHASumMismatch, FDSizeMismatch,
                                   FDUnrecognizedStatusCode)
 
@@ -63,7 +63,7 @@ class FileDownloader(object):
         f = open(self._destination, "wb")
         chunks = int(ceil(self.get_size() / float(self.CHUNK_SIZE)))
 
-        if util.is_ci():
+        if app.is_disabled_progressbar():
             click.echo("Downloading...")
             for _ in range(0, chunks):
                 f.write(next(itercontent))
diff --git a/platformio/unpacker.py b/platformio/unpacker.py
index f4ef32db..ab8955cd 100644
--- a/platformio/unpacker.py
+++ b/platformio/unpacker.py
@@ -20,7 +20,7 @@ from zipfile import ZipFile
 
 import click
 
-from platformio import util
+from platformio import app, util
 from platformio.exception import UnsupportedArchiveType
 
 
@@ -92,7 +92,7 @@ class FileUnpacker(object):
             raise UnsupportedArchiveType(archpath)
 
     def start(self):
-        if util.is_ci():
+        if app.is_disabled_progressbar():
             click.echo("Unpacking...")
             for item in self._unpacker.get_items():
                 self._unpacker.extract_item(item, self._dest_dir)