https://ftp.debian.org/debian/pool/main/r/ruby-ffi-rzmq-core/?C=N;O=D
Index of /debian/pool/main/r/ruby-ffi-rzmq-core
index ofdebianpoolmainr
https://www.r-project.org/nosvn/R.check/r-oldrel-macos-x86_64/rzmq-00install.html
Install log for 'rzmq'
installlog