diff --git a/dev-python/nwb-conversion-tools/ChangeLog b/dev-python/nwb-conversion-tools/ChangeLog
new file mode 100644
index 0000000..25228b3
--- /dev/null
+++ b/dev-python/nwb-conversion-tools/ChangeLog
@@ -0,0 +1,6 @@
+*nwb-conversion-tools-0.9.3 (19 Oct 2021)
+
+  19 Oct 2021;  <chymera@gentoo.org>
+  +files/nwb-conversion-tools-0.9.3-no-git-versioncheck.patch, +metadata.xml,
+  +nwb-conversion-tools-0.9.3.ebuild:
+  dev-python/nwb-conversion-tools: new package (DANDI ephys stack)
diff --git a/dev-python/nwb-conversion-tools/Manifest b/dev-python/nwb-conversion-tools/Manifest
new file mode 100644
index 0000000..c26f42f
--- /dev/null
+++ b/dev-python/nwb-conversion-tools/Manifest
@@ -0,0 +1 @@
+DIST nwb-conversion-tools-0.9.3.tar.gz 8516667 SHA256 4a87c4d014c7737db469acb86bb7f5434bbdc271316f60b1bd3f145258279215 SHA512 24c3c8cd8ae7cdec14a758890cbd6c24b2cc02c6b6468aadb94b5f6ce6ff88feea626e7febc3a9b3ea993019012e0b6bc6d31c91fa3810a0ea92d5625769e955 WHIRLPOOL 27c040d18a84cc41c04397952318d26b9dfe0521b5daaf8c62fea877d55cfeda967fd9664c849c753e0024b1e2b2f7d7dc94bb3e6e2f2bde6991911b5d422e0b
diff --git a/dev-python/nwb-conversion-tools/files/nwb-conversion-tools-0.9.3-no-git-versioncheck.patch b/dev-python/nwb-conversion-tools/files/nwb-conversion-tools-0.9.3-no-git-versioncheck.patch
new file mode 100644
index 0000000..d86dfee
--- /dev/null
+++ b/dev-python/nwb-conversion-tools/files/nwb-conversion-tools-0.9.3-no-git-versioncheck.patch
@@ -0,0 +1,13 @@
+--- a/setup.py	2021-10-19 07:59:23.483551681 -0400
++++ b/setup.py	2021-10-19 08:00:20.289169440 -0400
+@@ -22,10 +22,6 @@
+ with open(os.path.join(here, req_file)) as f:
+     install_requires = f.read().strip().split("\n")
+ 
+-# Get remote version
+-remote_version = subprocess.run(["git", "describe", "--tags"], stdout=subprocess.PIPE).stdout.decode("utf-8").strip()
+-assert "." in remote_version
+-
+ setup(
+     name="nwb-conversion-tools",
+     version="0.9.3",
diff --git a/dev-python/nwb-conversion-tools/metadata.xml b/dev-python/nwb-conversion-tools/metadata.xml
new file mode 100644
index 0000000..b9b71ad
--- /dev/null
+++ b/dev-python/nwb-conversion-tools/metadata.xml
@@ -0,0 +1,15 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>gentoo@chymera.eu</email>
+		<name>Horea Christian</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>sci@gentoo.org</email>
+		<name>Gentoo Science Project</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">SpikeInterface/spikeinterface</remote-id>
+	</upstream>
+</pkgmetadata>
diff --git a/dev-python/nwb-conversion-tools/nwb-conversion-tools-0.9.3.ebuild b/dev-python/nwb-conversion-tools/nwb-conversion-tools-0.9.3.ebuild
new file mode 100644
index 0000000..417ca80
--- /dev/null
+++ b/dev-python/nwb-conversion-tools/nwb-conversion-tools-0.9.3.ebuild
@@ -0,0 +1,51 @@
+# Copyright 2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..9} )
+# 3.10 missing on numba and spyking-circus
+inherit distutils-r1
+
+DESCRIPTION="Create NWB files by converting proprietary formats and adding essential metadata"
+HOMEPAGE="https://github.com/catalystneuro/nwb-conversion-tools"
+SRC_URI="https://github.com/catalystneuro/nwb-conversion-tools/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="test"
+#RESTRICT="test"
+
+RDEPEND="
+	dev-python/h5py[${PYTHON_USEDEP}]
+	dev-python/jsonschema[${PYTHON_USEDEP}]
+	dev-python/lxml[${PYTHON_USEDEP}]
+	dev-python/natsort[${PYTHON_USEDEP}]
+	dev-python/neo[${PYTHON_USEDEP}]
+	dev-python/numpy[${PYTHON_USEDEP}]
+	dev-python/pandas[${PYTHON_USEDEP}]
+	dev-python/psutil[${PYTHON_USEDEP}]
+	dev-python/pynwb[${PYTHON_USEDEP}]
+	dev-python/pyyaml[${PYTHON_USEDEP}]
+	dev-python/scipy[${PYTHON_USEDEP}]
+	dev-python/spikeextractors[${PYTHON_USEDEP}]
+	dev-python/tqdm[${PYTHON_USEDEP}]
+"
+# also needs:
+# spikesorters
+# spiketoolkit
+# neo == 0.9.0, actually
+# roiextractors
+DEPEND="
+	test? (
+		${RDEPEND}
+	)
+"
+BDEPEND=""
+
+PATCHES=(
+	"${FILESDIR}/${PN}-0.9.3-no-git-versioncheck.patch"
+)
+
+distutils_enable_tests pytest