diff --git a/.github/default_release_notes.md b/.github/default_release_notes.md
new file mode 100644
index 0000000..3f2050d
--- /dev/null
+++ b/.github/default_release_notes.md
@@ -0,0 +1,13 @@
+Prebuilt versions of the toolchains.
+
+To use them, download the appropriate archive and unpack it in your `${HOME}`,
+so that the toolchain ends up in (here, for `kindlepw2`)
+ `${HOME}/x-tools/arm-kindlepw2-linux-gnueabi`.  Then add `${HOME}/x-tools/*/bin`
+to your `PATH`.
+
+The `x-compile.sh` script included in this repo can do that (and more) for you.
+Using `kindlepw2` as an example toolchain again:
+- if you need a persistent custom sysroot (e.g., if you intend to build a full dependency chain):
+`source ${PWD}/refs/x-compile.sh kindlepw2 env`
+- if you just need a compiler:
+`source ${PWD}/refs/x-compile.sh kindlepw2 env bare`
diff --git a/.github/workflows/toolchain.yml b/.github/workflows/toolchain.yml
index c2b821f..39758ae 100644
--- a/.github/workflows/toolchain.yml
+++ b/.github/workflows/toolchain.yml
@@ -1,33 +1,79 @@
 name: Toolchain
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 on: [push, pull_request, workflow_dispatch]
 
 jobs:
+
   toolchain:
-    runs-on: ubuntu-20.04
+
+    runs-on: ubuntu-latest
+    container:
+      image: koreader/kobase:0.4.0-22.04
 
     strategy:
+      fail-fast: false
       matrix:
-        tc: [kindle, kindle5, kindlepw2, kindlehf, kobo, kobov4, kobov5, nickel, remarkable, cervantes, pocketbook, bookeen]
+        tc: [kindle, kindle5, kindlepw2, kindlehf, kobo, kobov4, kobov5, nickel, remarkable, remarkable-aarch64, cervantes, pocketbook, bookeen]
 
     steps:
-      - name: Check out Git repository
+      - name: Checkout repository
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
           submodules: recursive
 
-      - name: Install Deps
-        run:  sudo apt-get install build-essential autoconf automake bison flex gawk libtool libtool-bin libncurses-dev curl file git gperf help2man texinfo unzip wget
+      - name: Install deps
+        run: |
+          sudo apt-get update
+          sudo apt-get install --no-install-recommends -y bison flex gawk gperf help2man libncurses-dev libtool-bin rsync texinfo
 
-      - name: gen-tc
+      - name: Generate toolchain
         run: ./gen-tc.sh ${{ matrix.tc }}
 
-      - name: tar
+      - name: Tar artifacts
         run: tar -C ~ -czf ${{ matrix.tc }}.tar.gz x-tools
 
-      - name: Uploading artifacts
+      - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.tc }}
           path: ${{ matrix.tc }}.tar.gz
+
+  release:
+
+    if: ${{ !cancelled() && startsWith(github.ref, 'refs/tags/') }}
+    needs: toolchain
+
+    runs-on: ubuntu-latest
+
+    permissions:
+        contents: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          merge-multiple: true
+          path: artifacts
+
+      - name: Create release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          # Check if release already exists.
+          gh release list --json name,tagName,isDraft,createdAt,publishedAt | jq --color-output --exit-status --raw-output '.[] | select(.tagName == "${{ github.ref_name }}") | if .tagName == "" then halt_error end' ||
+          # And create it if it does not.
+          gh release create '${{ github.ref_name }}' --draft --notes-file .github/default_release_notes.md --title 'koxtoolchain ${{ github.ref_name }}' --verify-tag
+
+      - name: Upload release artifacts
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: gh release upload '${{ github.ref_name }}' artifacts/* --clobber
diff --git a/gen-tc.sh b/gen-tc.sh
index acb36fd..ccb57ec 100755
--- a/gen-tc.sh
+++ b/gen-tc.sh
@@ -181,4 +181,4 @@ case $1 in
 		echo "${HELP_MSG}"
 		exit 1
 		;;
-esac
+esac
\ No newline at end of file
diff --git a/refs/x-compile.sh b/refs/x-compile.sh
index da3bde8..bd401b5 100755
--- a/refs/x-compile.sh
+++ b/refs/x-compile.sh
@@ -52,6 +52,9 @@ case ${1} in
 	remarkable | reMarkable | Remarkable )
 		KINDLE_TC="REMARKABLE"
 	;;
+	remarkable-aarch64 )
+		KINDLE_TC="REMARKABLE_AARCH64"
+	;;
 	pocketbook | pb | PB )
 		KINDLE_TC="PB"
 	;;
@@ -625,6 +628,70 @@ case ${KINDLE_TC} in
 
 		DEVICE_USERSTORE="/home/root"
 	;;
+	REMARKABLE_AARCH64 )
+		ARCH_FLAGS="-march=armv8-a+crc+crypto -mtune=cortex-a53"
+		CROSS_TC="aarch64-remarkable-linux-gnu"
+		TC_BUILD_DIR="${HOME}/Kindle/CrossTool/Build_${KINDLE_TC}"
+
+		# Export it for our CMakeCross TC file
+		export CROSS_TC
+		export TC_BUILD_DIR
+
+		export CROSS_PREFIX="${CROSS_TC}-"
+		export PATH="${HOME}/x-tools/${CROSS_TC}/bin:${PATH}"
+
+		## NOTE: Upstream is (currently) using GCC 7.3, so we have no potential C++ ABI issue to take care of :)
+
+		BASE_CFLAGS="-O3 -ffast-math ${ARCH_FLAGS} -pipe -fomit-frame-pointer -frename-registers -fweb -flto=${AUTO_JOBS} -fuse-linker-plugin"
+		NOLTO_CFLAGS="-O3 -ffast-math ${ARCH_FLAGS} -pipe -fomit-frame-pointer -frename-registers -fweb"
+		## Here be dragons!
+		RICE_CFLAGS="-O3 -ffast-math -ftree-vectorize -funroll-loops ${ARCH_FLAGS} -pipe -fomit-frame-pointer -frename-registers -fweb -flto=${AUTO_JOBS} -fuse-linker-plugin"
+
+		## NOTE: Check if LTO still horribly breaks some stuff...
+		## NOTE: See https://gcc.gnu.org/gcc-4.9/changes.html for the notes about building LTO-enabled static libraries... (gcc-ar/gcc-ranlib)
+		## NOTE: And see https://gcc.gnu.org/gcc-5/changes.html to rejoice because we don't have to care about broken build-systems with mismatched compile/link time flags anymore :).
+		export AR="${CROSS_TC}-gcc-ar"
+		export RANLIB="${CROSS_TC}-gcc-ranlib"
+		export NM="${CROSS_TC}-gcc-nm"
+		## NOTE: Also, BOLO for packages thant link with $(CC) $(LDFLAGS) (ie. without CFLAGS). This is BAD. One (dirty) workaround if you can't fix the package is to append CFLAGS to the end of LDFLAGS... :/
+		## NOTE: ... although GCC 5 should handle this in a transparent & sane manner, so, yay :).
+		#BASE_CFLAGS="${NOLTO_CFLAGS}"
+		export CFLAGS="${BASE_CFLAGS}"
+		export CXXFLAGS="${BASE_CFLAGS}"
+		# NOTE: Use -isystem instead of -I to make sure GMP doesn't do crazy stuff... (FIXME: -idirafter sounds more correct for our use-case, though...)
+		BASE_CPPFLAGS="-isystem${TC_BUILD_DIR}/include"
+		export CPPFLAGS="${BASE_CPPFLAGS}"
+		BASE_LDFLAGS="-L${TC_BUILD_DIR}/lib -Wl,-O1 -Wl,--as-needed"
+		# NOTE: Dirty LTO workaround (cf. earlier). All hell might break loose if we tweak CFLAGS for some packages...
+		#BASE_LDFLAGS="${BASE_CFLAGS} ${BASE_LDFLAGS}"
+		export LDFLAGS="${BASE_LDFLAGS}"
+
+		# NOTE: We're no longer using the gold linker by default...
+		# FIXME: Because for some mysterious reason, gold + LTO leads to an unconditional dynamic link against libgcc_s (uless -static-libgcc is passed, of course).
+		export CTNG_LD_IS="bfd"
+
+		## NOTE: We jump through terrible hoops to counteract libtool's stripping of 'unknown' or 'harmful' FLAGS... (cf. https://www.gnu.org/software/libtool/manual/html_node/Stripped-link-flags.html)
+		## That's a questionable behavior that is bound to screw up LTO in fun and interesting ways, at the very least on the performance aspect of things...
+		## Store those in the right format here, and apply patches or tricks to anything using libtool, because of course it's a syntax that gcc doesn't know about, so we can't simply put it in the global LDFLAGS.... -_-".
+		## And since autotools being autotools, it's used in various completely idiosyncratic ways, we can't always rely on simply overriding AM_LDFLAGS...
+		## NOTE: Hopefully, GCC 5's smarter LTO handling means we don't have to care about that anymore... :).
+		export XC_LINKTOOL_CFLAGS="-Wc,-ffast-math -Wc,-fomit-frame-pointer -Wc,-frename-registers -Wc,-fweb"
+
+		BASE_HACKDIR="${SVN_ROOT}/Configs/trunk/Kindle/rM_aarch64_Hacks"
+
+		# We always rely on the native pkg-config, with custom search paths
+		BASE_PKG_CONFIG="pkg-config"
+		export PKG_CONFIG="${BASE_PKG_CONFIG}"
+		BASE_PKG_CONFIG_LIBDIR="${TC_BUILD_DIR}/lib/pkgconfig"
+		export PKG_CONFIG_PATH=""
+		export PKG_CONFIG_LIBDIR="${BASE_PKG_CONFIG_LIBDIR}"
+
+		## CMake is hell.
+		export CMAKE="cmake -DCMAKE_TOOLCHAIN_FILE=${SCRIPTS_BASE_DIR}/CMakeCross.txt -DCMAKE_INSTALL_PREFIX=${TC_BUILD_DIR}"
+
+		DEVICE_USERSTORE="/home/root"
+	;;
+
 	PB )
 		# NOTE: The TC itself is built in ARM mode, otherwise glibc 2.9 doesn't build (fails with a "r15 not allowed here" assembler error on csu/libc-start.o during the early multilib start-files step).
 		#       AFAICT, the official SDK doesn't make a specific choice on that front (i.e., it passes neither -marm not -mthumb. That usually means ARM)...