diff --git a/scripts/serve-frank-archon.sh b/scripts/serve-frank-archon.sh
index fde4993..2cf39f3 100755
--- a/scripts/serve-frank-archon.sh
+++ b/scripts/serve-frank-archon.sh
@@ -45,7 +45,7 @@ set +a
 : "${FRANK_ARCHON_IMAGE:?FRANK_ARCHON_IMAGE must name the radiance image}"
 : "${FRANK_ARCHON_MODEL_DIR:?FRANK_ARCHON_MODEL_DIR must name the .rad dir}"
 : "${FRANK_ARCHON_MODEL_FILE:?FRANK_ARCHON_MODEL_FILE must name the .rad file}"
-: "${FRANK_ARCHON_STATE_DIR:?FRANK_ARCHON_STATE_DIR must name the /data state dir}"
+: "${FRANK_ARCHON_STATE_DIR:?FRANK_ARCHON_STATE_DIR must name the host dir holding the rad-tune cache}"
 : "${FRANK_ARCHON_CONTAINER:?FRANK_ARCHON_CONTAINER must name the container}"
 : "${FRANK_ARCHON_SERVED_NAME:?FRANK_ARCHON_SERVED_NAME must name the alias}"
 : "${FRANK_ARCHON_PORT:?FRANK_ARCHON_PORT must be the port}"