RbNaCl is an FFI wrapper for libsodium, a portable repackaging of NaCl. You will need libsodium installed or RbNaCl will not work.

This page contains information on how to install libsodium on various platforms.

• Visit https://download.libsodium.org/libsodium/releases/
• Downloaded latest pre-built binary e.g. libsodium-1.0.18-msvc.zip
• Extract the .zip file and locate an appropriate DLL file, e.g. libsodium-1.0.18-msvc\libsodium\x64\Release\v142\dynamic\libsodium.dll
• Copy libsodium.dll to C:\Windows\System32\sodium.dll

• Install Homebrew
• Run brew install libsodium

You will either need to compile libsodium from source or install an appropriate package for your distribution:

• Enable EPEL
• Run yum install libsodium

NOTE: packages for other Debian releases are available

• apt-get install libsodium18

• apt-get install libsodium18

• apt-get install libsodium23