diff --git a/README.md b/README.md
index 2b2ce95..5c39c2b 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ See the ISO link on [omarchy.org](https://omarchy.org).
 
 ## Creating the ISO
 
-Run `./bin/omarchy-iso-make`; output goes into `./release`.
+Run `./bin/omarchy-iso-make`; output goes into `./release`. By default the ISO uses the Omarchy packages and tracks the `quattro` branch, from the stable mirror. Pass `--edge` to use `omarchy-dev` and `omarchy-settings-dev` from the edge mirror.
 
 For local development, build the ISO from sibling checkouts:
 
@@ -18,7 +18,7 @@ For local development, build the ISO from sibling checkouts:
 
 Despite the local folder name, the first argument is the Omarchy source checkout (runtime commands, configs, setup scripts, themes, shell, migrations). The installer itself lives in this ISO repo.
 
-Use `--dev` or `--rc` to build against those package channels.
+Use `--dev` or `--rc` to build against those package channels. Both `--dev` and `--edge` select the dev packages from the edge mirror.
 
 ## Testing the ISO
 
diff --git a/bin/omarchy-iso-make b/bin/omarchy-iso-make
index 7b785d0..7e1e7a6 100755
--- a/bin/omarchy-iso-make
+++ b/bin/omarchy-iso-make
@@ -19,6 +19,11 @@ while [[ $# -gt 0 ]]; do
     OMARCHY_INSTALL_DEBUG=1
     shift
     ;;
+  --edge)
+    OMARCHY_ISO_REF=edge
+    OMARCHY_MIRROR=edge
+    shift
+    ;;
   --local-source)
     LOCAL_OMARCHY_PATH="${2:-}"
     LOCAL_PKGS_PATH="${3:-}"
@@ -42,7 +47,7 @@ while [[ $# -gt 0 ]]; do
     ;;
   *)
     echo "Unknown option: $1"
-    echo "Usage: $0 [--no-cache] [--no-boot-offer] [--debug] [--dev|--rc] [--local-source <omarchy-checkout> <pkgs-checkout>]"
+    echo "Usage: $0 [--no-cache] [--no-boot-offer] [--debug] [--edge] [--dev|--rc] [--local-source <omarchy-checkout> <pkgs-checkout>]"
     exit 1
     ;;
   esac
@@ -98,7 +103,7 @@ BUILD_ROOT=$(realpath "${BASH_SOURCE[0]%/*}/..")
 BUILD_RELEASE_PATH="$BUILD_ROOT/release"
 mkdir -p "$BUILD_RELEASE_PATH"
 
-OMARCHY_ISO_REF="${OMARCHY_ISO_REF:-stable}"
+OMARCHY_ISO_REF="${OMARCHY_ISO_REF:-quattro}"
 OMARCHY_MIRROR="${OMARCHY_MIRROR:-stable}"
 
 DOCKER_ARGS=(
diff --git a/bin/omarchy-iso-release b/bin/omarchy-iso-release
index ce4482f..cf5eb99 100755
--- a/bin/omarchy-iso-release
+++ b/bin/omarchy-iso-release
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 MAKE_ARGS=()
-ISO_REF=stable
+ISO_REF=quattro
 RELEASE_SUFFIX=""
 
 while [[ $# -gt 0 ]]; do
diff --git a/builder/build-iso.sh b/builder/build-iso.sh
index a3c8a7b..6206316 100755
--- a/builder/build-iso.sh
+++ b/builder/build-iso.sh
@@ -2,15 +2,15 @@
 
 set -e
 
-OMARCHY_ISO_REF="${OMARCHY_ISO_REF:-stable}"
+OMARCHY_ISO_REF="${OMARCHY_ISO_REF:-quattro}"
 OMARCHY_MIRROR="${OMARCHY_MIRROR:-stable}"
 
-# Stable ISOs install the stable package names. Dev/local-source ISOs install
-# the dev packages explicitly rather than relying on pacman's provides=omarchy
-# resolution, so the offline mirror and target install show the real package
-# names being tested.
+# Quattro, edge, dev, and local-source ISOs install the dev packages explicitly.
+# Those package recipes track the quattro branch. This avoids relying on
+# pacman's provides=omarchy resolution and shows the real package names being
+# tested in the offline mirror and target install.
 case "$OMARCHY_ISO_REF" in
-  dev|local)
+  quattro|edge|dev|local)
     : "${OMARCHY_RUNTIME_PACKAGE:=omarchy-dev}"
     : "${OMARCHY_SETTINGS_PACKAGE:=omarchy-settings-dev}"
     ;;