Cocoa Podでインストール出来ない Cocoa podOSS Analyzing dependencies [!] Unable to satisfy the following requirements: - `Timepiece (~> 0.4.0)` required by `Podfile` Cocoa podrbenv2.2.2ruby Podfile platform :ios, '7.1' pod "Timepiece", "~> 0.4.0"

source '
platform :ios, '8.0'
use_frameworks!
target 'hoge' do
pod "Timepiece", "~> 0.4.0"
end