diff --git a/CMakeLists.txt b/CMakeLists.txt
index 90d2bc9..6d634f7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ else()
     cmake_minimum_required(VERSION 3.14.3)
 endif()
 
-project(ntfs2btrfs VERSION 20210523)
+project(ntfs2btrfs VERSION 20210923)
 
 include(GNUInstallDirs)
 
diff --git a/README.md b/README.md
index f8e5ac6..6c108fd 100644
--- a/README.md
+++ b/README.md
@@ -23,8 +23,8 @@ On Windows, from an Administrator command prompt:
 
 `ntfs2btrfs.exe D:\`
 
-Bear in mind that it won't work with your boot drive or a drive with a
-pagefile on it.
+Bear in mind that it won't work with your boot drive or a drive containing a
+pagefile that's currently in use.
 
 On Linux, as root:
 
@@ -39,7 +39,7 @@ download the latest Zip file.
 For Linux:
 * [Arch](https://aur.archlinux.org/packages/ntfs2btrfs-git) (thanks to [nicman23](https://github.com/nicman23))
 * [Fedora](https://src.fedoraproject.org/rpms/ntfs2btrfs) (thanks to [Conan-Kudo](https://github.com/Conan-Kudo))
-* [Gentoo ebuild](https://raw.githubusercontent.com/maharmstone/ntfs2btrfs/master/ntfs2btrfs-20210523.ebuild)
+* [Gentoo ebuild](https://raw.githubusercontent.com/maharmstone/ntfs2btrfs/master/ntfs2btrfs-20210923.ebuild)
 * [Debian & Ubuntu](https://sid.ethz.ch/debian/ntfs2btrfs/) (thanks to [alexmyczko](https://github.com/alexmyczko))
 
 For other distributions or operating systems, you will need to compile it yourself - see
@@ -48,6 +48,16 @@ below.
 Changelog
 ---------
 
+* 20210923
+  * Added (Btrfs) compression support (zlib, lzo, and zstd)
+  * Added support for other hash algorithms: xxhash, sha256, and blake2
+  * Added support for rolling back to NTFS
+  * Added support for NT4-style security descriptors
+  * Increased conversion speed for volume with many inodes
+  * Fixed bug when fragmented file was in superblock location
+  * Fixed buffer overflow when reading security descriptors
+  * Fixed bug where filesystems would be corrupted in a way that `btrfs check` doesn't pick up
+
 * 20210523
   * Improved handling of large compressed files
 
@@ -82,6 +92,10 @@ On Linux:
 You'll also need [libfmt](https://github.com/fmtlib/fmt) installed - it should be
 in your package manager.
 
+Compression support requires zlib, lzo, and/or zstd - again, they will be in your
+package manager. See also the cmake options WITH_ZLIB, WITH_LZO, and WITH_ZSTD,
+if you want to disable this.
+
 What works
 ----------
 
@@ -92,11 +106,11 @@ What works
 * Security descriptors
 * Alternate data streams
 * DOS attributes (hidden, system, etc.)
+* Rollback to original NTFS image
 
 What doesn't work
 -----------------
 
-* Rollback to original NTFS image
 * Windows' old extended attributes (you're not using these)
 * Large (i.e >16KB) ADSes (you're not using these either)
 * Preservation of LXSS metadata
diff --git a/ntfs2btrfs-20210523.ebuild b/ntfs2btrfs-20210523.ebuild
deleted file mode 100644
index a7523eb..0000000
--- a/ntfs2btrfs-20210523.ebuild
+++ /dev/null
@@ -1,30 +0,0 @@
-# Copyright 2021 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=7
-
-inherit cmake
-
-CMAKE_MAKEFILE_GENERATOR="emake"
-
-DESCRIPTION="Conversion tool from NTFS to Btrfs"
-HOMEPAGE="https://github.com/maharmstone/ntfs2btrfs"
-SRC_URI="https://github.com/maharmstone/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
-
-LICENSE="GPL-2"
-SLOT="0"
-KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
-IUSE=""
-
-DEPEND="dev-libs/libfmt"
-RDEPEND="${DEPEND}"
-BDEPEND=""
-
-src_prepare() {
-	cmake_src_prepare
-}
-
-src_configure() {
-	cmake_src_configure
-}
-
diff --git a/ntfs2btrfs-20210923.ebuild b/ntfs2btrfs-20210923.ebuild
new file mode 100644
index 0000000..9dc936a
--- /dev/null
+++ b/ntfs2btrfs-20210923.ebuild
@@ -0,0 +1,42 @@
+# Copyright 2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake
+
+DESCRIPTION="Conversion tool from NTFS to Btrfs"
+HOMEPAGE="https://github.com/maharmstone/ntfs2btrfs"
+
+if [[ ${PV} = *9999 ]]; then
+    inherit git-r3
+    EGIT_REPO_URI="https://github.com/maharmstone/ntfs2btrfs.git"
+else
+	SRC_URI="https://github.com/maharmstone/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
+fi
+
+LICENSE="GPL-2"
+SLOT="0"
+IUSE="+zlib +lzo +zstd"
+
+DEPEND="dev-libs/libfmt
+	zlib? ( sys-libs/zlib )
+	lzo? ( dev-libs/lzo )
+	zstd? ( app-arch/zstd )"
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+src_prepare() {
+	cmake_src_prepare
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DWITH_ZLIB=$(usex zlib)
+		-DWITH_LZO=$(usex lzo)
+		-DWITH_ZSTD=$(usex zstd)
+	)
+
+	cmake_src_configure
+}