=> "/opt/pkg/bin/bmake" ["-C", "/Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-arm64/multimedia/libdvdcss", "checksum", "BATCH=1", "DEPENDS_TARGET=/nonexistent"]
ERROR: ======================================================================
ERROR: 
ERROR: Please define LIBDVDCSS_MASTER_SITES in mk.conf.
ERROR: Alternatively you may download 'libdvdcss-1.4.3.tar.bz2' manually
ERROR: to /Volumes/data/distfiles.
ERROR: 
ERROR: ======================================================================
*** Error code 1

Stop.
bmake: stopped making "checksum" in /Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-arm64/multimedia/libdvdcss