diff --git a/boot.sh b/boot.sh
index 0ab69d5b..e17c7af2 100755
--- a/boot.sh
+++ b/boot.sh
@@ -17,6 +17,21 @@ ansi_art='                 ▄▄▄
 clear
 echo -e "\n$ansi_art\n"
 
+# Use custom branch if instructed, otherwise default to master
+OMARCHY_REF="${OMARCHY_REF:-master}"
+
+# Set mirror based on branch
+if [[ $OMARCHY_REF == "dev" ]]; then
+  export OMARCHY_MIRROR=edge
+  echo 'Server = https://mirror.omarchy.org/$repo/os/$arch' | sudo tee /etc/pacman.d/mirrorlist >/dev/null
+elif [[ $OMARCHY_REF == "rc" ]]; then
+  export OMARCHY_MIRROR=rc
+  echo 'Server = https://rc-mirror.omarchy.org/$repo/os/$arch' | sudo tee /etc/pacman.d/mirrorlist >/dev/null
+else
+  export OMARCHY_MIRROR=stable
+  echo 'Server = https://stable-mirror.omarchy.org/$repo/os/$arch' | sudo tee /etc/pacman.d/mirrorlist >/dev/null
+fi
+
 sudo pacman -Syu --noconfirm --needed git
 
 # Use custom repo if specified, otherwise default to basecamp/omarchy
@@ -26,19 +41,10 @@ echo -e "\nCloning Omarchy from: https://github.com/${OMARCHY_REPO}.git"
 rm -rf ~/.local/share/omarchy/
 git clone "https://github.com/${OMARCHY_REPO}.git" ~/.local/share/omarchy >/dev/null
 
-# Use custom branch if instructed, otherwise default to master
-OMARCHY_REF="${OMARCHY_REF:-master}"
 echo -e "\e[32mUsing branch: $OMARCHY_REF\e[0m"
 cd ~/.local/share/omarchy
 git fetch origin "${OMARCHY_REF}" && git checkout "${OMARCHY_REF}"
 cd -
 
-# Set edge mirror for dev installs
-if [[ $OMARCHY_REF == "dev" ]]; then
-  export OMARCHY_MIRROR=edge
-else
-  export OMARCHY_MIRROR=stable
-fi
-
 echo -e "\nInstallation starting..."
 source ~/.local/share/omarchy/install.sh
diff --git a/install/preflight/pacman.sh b/install/preflight/pacman.sh
index 6479e792..c37d828d 100644
--- a/install/preflight/pacman.sh
+++ b/install/preflight/pacman.sh
@@ -13,5 +13,5 @@ if [[ -n ${OMARCHY_ONLINE_INSTALL:-} ]]; then
   omarchy-pkg-add omarchy-keyring
 
   # Refresh all repos
-  sudo pacman -Syyu --noconfirm
+  sudo pacman -Syyuu --noconfirm
 fi