Cannot import a private cocoapod in developing pod - ios

Question

I am creating a private pod suppose "pod X" which have dependency on suppose "pod Y". I successfully created and it passed the validation but I cant import classes of "pod Y" in "pod X" hence I cannot write code in "pod X" using "pod Y" classes. I have added dependency correctly. If I write the import statement its gives error "No such Module". For all this purpose I am using Swift as language.
This is how my podspec file looks I have changed name and links in the following for privacy:
Pod::Spec.new do |s|
s.name = 'Pod X'
s.version = '0.1.0'
s.license = { :type => 'MIT', :file => 'LICENSE' }
s.summary = 'Pod X is to handle all the network related and Models etc'
# This description is used to generate tags and improve search results.
# * Think: What does it do? Why did you write it? What is the focus?
# * Try to keep it short, snappy and to the point.
# * Write the description between the DESC delimiters below.
# * Finally, don't worry about the indent, CocoaPods strips it!
s.description = <<-DESC
TODO: Pod X is to handle all the network related and Models etc.
DESC
s.homepage = 'https://****/podx.git'
s.authors = { 'MGNetworkClient_OWNER' => 'USER_EMAIL' }
s.source = { :git => 'https://***/podx.git', :tag => s.version }
s.ios.deployment_target = '8.0'
s.source_files = 'Source/*.swift'
s.resource_bundles = {
'MGNetworkClient' => ['Resources/**/*.{png}']
}
s.dependency 'Pod Y'
end
Any help would be appreciated.