=> "/opt/pkg/bin/bmake" ["-C", "/data/jenkins/workspace/pkgsrc-upstream-trunk/lang/gcc6-aux", "checksum", "BATCH=1", "DEPENDS_TARGET=/nonexistent"]
Fetching ada-bootstrap.x86_64.solaris.511.tar.bz2
Unable to fetch http://downloads.dragonlace.net/src/ada-bootstrap.x86_64.solaris.511.tar.bz2: dns error
Unable to fetch https://cdn.NetBSD.org/pub/pkgsrc/distfiles/ada-bootstrap.x86_64.solaris.511.tar.bz2: 404 Not Found
Unable to fetch http://ftp.fr.NetBSD.org/pub/pkgsrc/distfiles/ada-bootstrap.x86_64.solaris.511.tar.bz2: 404 Not Found
Unable to fetch https://ftp.NetBSD.org/pub/pkgsrc/distfiles/ada-bootstrap.x86_64.solaris.511.tar.bz2: 404 Not Found
*** Error code 1

Stop.
bmake: stopped making "checksum" in /data/jenkins/workspace/pkgsrc-upstream-trunk/lang/gcc6-aux