diff --git a/README.md b/README.md
index a8094dd..5a2b9c9 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` and the output goes into `./release`. You can build from your local $OMARCHY_PATH for testing by using `--local-source` or from a checkout of the dev branch (instead of master) by using `--dev`.
+Run `./bin/omarchy-iso-make` and the output goes into `./release`. You can build from your local `$OMARCHY_PATH` for testing with `--local-source`, from the dev branch with `--dev`, or from the quattro branch with `--quattro`. The dev and quattro builds use the edge package mirror.
 
 ### Environment Variables
 
diff --git a/bin/omarchy-iso-make b/bin/omarchy-iso-make
index 3bb93cb..349b971 100755
--- a/bin/omarchy-iso-make
+++ b/bin/omarchy-iso-make
@@ -25,6 +25,11 @@ while [[ $# -gt 0 ]]; do
     OMARCHY_MIRROR=edge
     shift
     ;;
+  --quattro)
+    OMARCHY_INSTALLER_REF=quattro
+    OMARCHY_MIRROR=edge
+    shift
+    ;;
   --rc)
     OMARCHY_MIRROR=rc
     OMARCHY_INSTALLER_REF=rc
@@ -32,7 +37,7 @@ while [[ $# -gt 0 ]]; do
     ;;
   *)
     echo "Unknown option: $1"
-    echo "Usage: $0 [--no-cache] [--no-boot-offer] [--local-source] [--dev] [--rc]"
+    echo "Usage: $0 [--no-cache] [--no-boot-offer] [--local-source] [--dev] [--quattro] [--rc]"
     exit 1
     ;;
   esac