Step 1: Project setup with old style Podfile
Step 2: Better Podfile
Step 3: `pod install` and... no building anymore

The error we get is:
ld: library not found for -lPods
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Step 4: Remove libPods.a and... it compiles again :)

Notice that it's in both app target and tests target.