build effect

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What did you do?

ℹ Please replace these two lines with what you did.
e.g. Run pod install

What did you expect to happen?

ℹ Please replace these two lines with what you expected to happen.
e.g. Install all pod dependencies correctly.

What happened instead?

ℹ Please replace these two lines with of what happened instead.
e.g. Pod A is missing the subspec B for target C.

CocoaPods Environment

ℹ Please replace these two lines with the output of pod env. e.g. via pod env | pbcopy

Project that demonstrates the issue

ℹ Please link to a project we can download that reproduces the issue. You can delete this section if your issue is unrelated to build problems, i.e. it's only an issue with CocoaPods the tool.