==> Creating clean working copy [build]...done ==> Making package: ruby1.9-rubocop 0.23.0-1 (Sat Oct 10 23:19:23 EDT 2015) ==> Retrieving sources... -> Found rubocop-0.23.0.gem ==> Validating source files with sha512sums... rubocop-0.23.0.gem ... Passed ==> Making package: ruby1.9-rubocop 0.23.0-1 (Sat Oct 10 23:19:23 EDT 2015) ==> Checking runtime dependencies... ==> Installing missing dependencies... error: target not found: ruby1.9-json ==> ERROR: 'pacman' failed to install missing dependencies. ==> WARNING: Failed to remove installed dependencies. ==> ERROR: Build failed, check /chroot/x86_64/build/build