hello, I want ask some questions about private repo on svn

[RogueAndy]

hello, I want ask some questions about private repo on svn,
like this:
in privateB {
s.dependency 'PrivateC', :svn => 'svn:loginuser//xxxxxxxxxxxx/PrivateC',
}
when I use "pod lib lint --allow-warnings",
but it show wrong,
"Invalid privateB.podspec file: [!] Unsupported version requirements."

how can I get s.dependency from other svn private repo?
thanks