+# Use fixed disk identifiers for Virtual Machine builds.
+# Useful for reproducible builds.
+# Default: 'no'
+# FIXED_DISK_IDENTIFIERS='yes'
+
+# Disk identifier when using FIXED_DISK_IDENTIFIERS='yes'.
+# Use uuid-runtime's uuidgen tool to generate random UUIDs on demand.
+# Default: '26ada0c0-1165-4098-884d-aafd2220c2c6'
+# DISK_IDENTIFIER="$(uuidgen)"
+