I am building this from with the docker environment, which has functioning DNS and web access:
root@fbubuntu:~# flex-builder -m ls1012ardb -a arm64
MACHINE: ls1012ardb
DESTARCH: arm64
INSTRUCTION: autobuild
MACHINE: ls1012ardb
CONFIGLIST: build_lsdk_internal.cfg
make: Entering directory '/home/qoriq/flexbuild/packages/firmware'
fetch firmware repositories ...
repo: dash-uboot
branch = devel
Cloning into 'dash-uboot'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dash/dash-uboot/' not found
repo: dash-rcw
branch = devel
Cloning into 'dash-rcw'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dash/dash-rcw/' not found
repo: qoriq-uefi-binary
branch = master
Cloning into 'qoriq-uefi-binary'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dash/qoriq-uefi-binary/' not found
repo: qoriq-fm-ucode
branch = sdk-v2.0.x
Cloning into 'qoriq-fm-ucode'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dpaamodules/fm-ucode/' not found
repo: mc-utils
branch = master
Cloning into 'mc-utils'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dash/mc-utils/' not found
repo: qoriq-mc-binary
branch = lsdk
Cloning into 'qoriq-mc-binary'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dpaa2/mc-binary/' not found
repo: ppa-generic
branch = master
Cloning into 'ppa-generic'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dnnpi/ppa-generic/' not found
repo: qoriq-qe-ucode
branch = master
Cloning into 'qoriq-qe-ucode'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dash/qoriq-qe-ucode/' not found
repo: qoriq-firmware-cortina
branch = master
Cloning into 'qoriq-firmware-cortina'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dash/qoriq-firmware-cortina/' not found
repo: qoriq-engine-pfe-bin
branch = master
Cloning into 'qoriq-engine-pfe-bin'...
fatal: repository 'https://bitbucket.sw.nxp.com/scm/dncpe/engine-pfe-bin/' not found
Makefile:288: recipe for target 'repo_fetch' failed
make: *** [repo_fetch] Error 128
make: Leaving directory '/home/qoriq/flexbuild/packages/firmware'