diff --git a/gentoo-2024.8/catalyst.txt b/gentoo-2024.8/catalyst.txt
new file mode 100644
index 0000000..892003e
--- /dev/null
+++ b/gentoo-2024.8/catalyst.txt
@@ -0,0 +1,36 @@
+# vim:set ft=sh:
+
+# After finishing a bootstrap, one may want to build a stage3 tarball and
+# accompanying ISO image...
+
+# Addendum: Build a stage3 and installer iso
+echo dev-util/catalyst >> /etc/portage/package.accept_keywords
+emerge dev-util/catalyst
+
+ROOT="$PWD/stage" USE=build emerge -1 sys-apps/baselayout
+ROOT="$PWD/stage" QUICKPKG_DEFAULT_OPTS=--include-config=y emerge --quickpkg-direct=y -K @system
+mkdir stage/etc/portage  # catalyst breaks otherwise...
+tar cf stage.tar -C stage .
+rm -rf stage
+xz -9v stage.tar
+mkdir -p /var/tmp/catalyst/builds/23.0-default
+mv stage.tar.xz /var/tmp/catalyst/builds/23.0-default/stage3-amd64-openrc-latest.tar.xz
+wget http://distfiles.gentoo.org/snapshots/squashfs/gentoo-20240801.xz.sqfs
+mkdir -p /var/tmp/catalyst/snapshots
+mv gentoo-20240801.xz.sqfs /var/tmp/catalyst/snapshots/gentoo-20240801.sqfs
+
+git clone https://anongit.gentoo.org/git/proj/releng.git
+git -C releng checkout 'master@{2024-08-01}'
+
+sed -e 's|@TIMESTAMP@|20240801|g' \
+    -e 's|@TREEISH@|20240801|g' \
+    -e 's|@REPO_DIR@|'"$PWD/releng"'|g' \
+    -i \
+    releng/releases/specs/amd64/stage1-openrc-23.spec \
+    releng/releases/specs/amd64/stage3-openrc-23.spec \
+    releng/releases/specs/amd64/installcd-stage1.spec \
+    releng/releases/specs/amd64/installcd-stage2-minimal.spec
+catalyst -f releng/releases/specs/amd64/stage1-openrc-23.spec
+catalyst -f releng/releases/specs/amd64/stage3-openrc-23.spec
+catalyst -f releng/releases/specs/amd64/installcd-stage1.spec
+catalyst -f releng/releases/specs/amd64/installcd-stage2-minimal.spec