diff --git a/setup/archiso/build.sh b/setup/archiso/build.sh
index a057f78..74718dc 100644
--- a/setup/archiso/build.sh
+++ b/setup/archiso/build.sh
@@ -3,8 +3,8 @@ set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 DOTFILES_DIR="$(cd "$SCRIPT_DIR/../.." && pwd)"
-WORK_DIR="/tmp/m-archy-build"
-OUT_DIR="${1:-/tmp/m-archy-out}"
+WORK_DIR="${WORK_DIR:-/tmp/m-archy-build}"
+OUT_DIR="${1:-${OUT_DIR:-/tmp/m-archy-out}}"
 PROFILE="$WORK_DIR/profile"
 RELENG="/usr/share/archiso/configs/releng"