diff --git a/controller/build.sh b/controller/build.sh
index 7ce67cb..d3a78c1 100755
--- a/controller/build.sh
+++ b/controller/build.sh
@@ -16,7 +16,11 @@
 set -euo pipefail
 
 # --- Configuration (edit these if your paths differ) ---
-REPO_DIR="/mnt/5_hdd/felhom.eu/git/felhom-controller"
+# The default is the shared DooPlex clone, and the release runbook names it. It is overridable
+# because that clone is shared: when another session has work in progress in it, the clean-tree gate
+# rightly forbids building over them, and the way to ship is a clean clone at the pushed commit —
+# not stashing somebody else's work. Set FELHOM_REPO_DIR to that clone.
+REPO_DIR="${FELHOM_REPO_DIR:-/mnt/5_hdd/felhom.eu/git/felhom-controller}"
 CONTROLLER_SRC="${REPO_DIR}/controller"
 WEBSITE_ASSETS_DIR="/mnt/5_hdd/felhom.eu/git/felhom.eu/website/assets"
 REGISTRY="gitea.dooplex.hu/admin"
@@ -61,6 +65,7 @@ info "║  felhom-controller image builder     ║"
 info "╚══════════════════════════════════════╝"
 info "Version:    ${VERSION}"
 info "Commit:     ${GIT_COMMIT}"
+info "Repo:       ${REPO_DIR}"
 info "Source:     ${CONTROLLER_SRC}"
 info "Build dir:  ${BUILD_DIR}"
 info "Image:      ${IMAGE}:${VERSION}"