rmt-server build fails currently with:

[  263s] Failed to connect to bus: Host is down
[  264s] /usr/lib/ruby/2.6.0/bundler/spec_set.rb:91:in `block in materialize':
Could not find rake-12.3.2 in any of the sources (Bundler::GemNotFound)
[  264s]     from /usr/lib/ruby/2.6.0/bundler/spec_set.rb:85:in `map!'
[  264s]     from /usr/lib/ruby/2.6.0/bundler/spec_set.rb:85:in `materialize'
[  264s]     from /usr/lib/ruby/2.6.0/bundler/definition.rb:170:in `specs'
[  264s]     from /usr/lib/ruby/2.6.0/bundler/definition.rb:237:in `specs_for'
[  264s]     from /usr/lib/ruby/2.6.0/bundler/definition.rb:226:in
`requested_specs'
[  264s]     from /usr/lib/ruby/2.6.0/bundler/runtime.rb:108:in `block in
definition_method'
[  264s]     from /usr/lib/ruby/2.6.0/bundler/runtime.rb:20:in `setup'
[  264s]     from /usr/lib/ruby/2.6.0/bundler.rb:107:in `setup'
[  264s]     from /usr/lib/ruby/2.6.0/bundler/setup.rb:20:in `<top (required)>'
[  264s]     from /usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in
`require'
[  264s]     from /usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in
`require'
[  264s]     from /usr/share/rmt/config/boot.rb:3:in `<top (required)>'
[  264s]     from bin/rails:8:in `require_relative'
[  264s]     from bin/rails:8:in `<main>'
[  264s] postinstall script of rmt-server-1.2.2-1.1.armv7hl.rpm failed
[  264s] 
[  264s] armbuild21 failed "build rmt-server.spec" at Tue Mar  5 12:06:56 UTC
2019.
[  264s] 
[  264s] ### VM INTERACTION START ###
[  267s] [  253.599238] sysrq: SysRq : Power Off
[  267s] [  253.613649] reboot: Power down
[  268s] ### VM INTERACTION END ###
[  268s] 
[  268s] armbuild21 failed "build rmt-server.spec" at Tue Mar  5 12:07:00 UTC
2019.


See
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:ARM/rmt-server/standard/armv7l