diff --git a/dev-python/s3transfer/Manifest b/dev-python/s3transfer/Manifest
new file mode 100644
index 0000000..5f15032
--- /dev/null
+++ b/dev-python/s3transfer/Manifest
@@ -0,0 +1 @@
+DIST s3transfer-0.3.3.tar.gz 118872 BLAKE2B a8e10a135052a29cbc5949bd8dc82d0b7f76840e6dbc6ba5ccdfe23757d363476f1dc330cee36ceb88e5c5287f644a27ed50b518a346f1b6b8ae38a9ca5576c9 SHA512 e258958b47812d8620ea6ef604dadb2a13beef9bbed005e8d38153039a291099786a3cec68511f2ff4372ff57f60440ca700b6783967484d8284b4ad0c1ae754
diff --git a/dev-python/s3transfer/files/s3transfer-0.3.3-py38.patch b/dev-python/s3transfer/files/s3transfer-0.3.3-py38.patch
new file mode 100644
index 0000000..89f3d4b
--- /dev/null
+++ b/dev-python/s3transfer/files/s3transfer-0.3.3-py38.patch
@@ -0,0 +1,32 @@
+From f211b9851698d07cf218e78ebb39a337c8751df8 Mon Sep 17 00:00:00 2001
+From: Christopher Baines <mail@cbaines.net>
+Date: Sat, 2 May 2020 15:19:58 +0100
+Subject: [PATCH] Fix test_download_futures_fail_triggers_shutdown with Python
+ 3.8
+
+The behaviour of set_exception for futures changed in Python 3.8, it'll now
+raise concurrent.futures.InvalidStateError if the future is already done [1],
+which is the case in this test because set_result has already been called on
+the future.
+
+1: https://bugs.python.org/issue33238
+
+Fix the test by not using the future from SequentialExecutor, and instead
+creating a future which doesn't have a result.
+---
+ tests/unit/test_s3transfer.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tests/unit/test_s3transfer.py b/tests/unit/test_s3transfer.py
+index a87b4dd..4715be2 100644
+--- a/tests/unit/test_s3transfer.py
++++ b/tests/unit/test_s3transfer.py
+@@ -465,7 +465,7 @@ def __init__(self, max_workers):
+                 self.is_first = True
+ 
+             def submit(self, function):
+-                future = super(FailedDownloadParts, self).submit(function)
++                future = futures.Future()
+                 if self.is_first:
+                     # This is the download_parts_thread.
+                     future.set_exception(
diff --git a/dev-python/s3transfer/metadata.xml b/dev-python/s3transfer/metadata.xml
new file mode 100644
index 0000000..fcbcd1b
--- /dev/null
+++ b/dev-python/s3transfer/metadata.xml
@@ -0,0 +1,17 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>chutzpah@gentoo.org</email>
+		<name>Patrick McLean</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>python@gentoo.org</email>
+		<name>Python</name>
+	</maintainer>
+	<stabilize-allarches/>
+	<upstream>
+		<remote-id type="github">boto/s3transfer</remote-id>
+		<remote-id type="pypi">s3transfer</remote-id>
+	</upstream>
+</pkgmetadata>
diff --git a/dev-python/s3transfer/s3transfer-0.3.3.ebuild b/dev-python/s3transfer/s3transfer-0.3.3.ebuild
new file mode 100644
index 0000000..370dd8a
--- /dev/null
+++ b/dev-python/s3transfer/s3transfer-0.3.3.ebuild
@@ -0,0 +1,36 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{6..9} )
+DISTUTILS_USE_SETUPTOOLS=bdepend
+
+inherit distutils-r1
+
+DESCRIPTION="An Amazon S3 Transfer Manager"
+HOMEPAGE="https://github.com/boto/s3transfer"
+SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="*"
+
+RDEPEND="
+	dev-python/botocore[${PYTHON_USEDEP}]
+"
+BDEPEND="
+	test? (
+		dev-python/mock[${PYTHON_USEDEP}]
+	)
+"
+
+distutils_enable_tests nose
+
+PATCHES=(
+	"${FILESDIR}"/${P}-py38.patch
+)
+
+python_test() {
+	nosetests -v tests/unit/ tests/functional/ || die "tests failed under ${EPYTHON}"
+}
diff --git a/metadata/md5-cache/dev-python/s3transfer-0.3.3 b/metadata/md5-cache/dev-python/s3transfer-0.3.3
new file mode 100644
index 0000000..9872113
--- /dev/null
+++ b/metadata/md5-cache/dev-python/s3transfer-0.3.3
@@ -0,0 +1,15 @@
+BDEPEND=test? ( dev-python/mock[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] ) test? ( dev-python/nose[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] dev-python/botocore[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] ) python_targets_python3_6? ( dev-lang/python:3.6 ) python_targets_python3_7? ( dev-lang/python:3.7 ) python_targets_python3_8? ( dev-lang/python:3.8 ) python_targets_python3_9? ( dev-lang/python:3.9 ) >=dev-lang/python-exec-2:=[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] dev-python/setuptools[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)]
+DEFINED_PHASES=compile configure install prepare test
+DESCRIPTION=An Amazon S3 Transfer Manager
+EAPI=7
+HOMEPAGE=https://github.com/boto/s3transfer
+IUSE=test python_targets_python3_6 python_targets_python3_7 python_targets_python3_8 python_targets_python3_9
+KEYWORDS=*
+LICENSE=Apache-2.0
+RDEPEND=dev-python/botocore[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)] python_targets_python3_6? ( dev-lang/python:3.6 ) python_targets_python3_7? ( dev-lang/python:3.7 ) python_targets_python3_8? ( dev-lang/python:3.8 ) python_targets_python3_9? ( dev-lang/python:3.9 ) >=dev-lang/python-exec-2:=[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)]
+REQUIRED_USE=|| ( python_targets_python3_6 python_targets_python3_7 python_targets_python3_8 python_targets_python3_9 )
+RESTRICT=!test? ( test )
+SLOT=0
+SRC_URI=mirror://pypi/s/s3transfer/s3transfer-0.3.3.tar.gz
+_eclasses_=distutils-r1	198e3b9ddb55ae36b2a50b07ca2877ef	multibuild	40fe59465edacd730c644ec2bc197809	multilib	2477ebe553d3e4d2c606191fe6c33602	multiprocessing	e32940a7b2a9992ad217eccddb84d548	python-r1	79e26ce8f853c9daebe9a4956e37cc1b	python-utils-r1	157a6a7a3e99c7dbdf81acc9dd4f57cd	toolchain-funcs	605c126bed8d87e4378d5ff1645330cb
+_md5_=24d570f769a23b4636e4e017b44b19e4