Problem in installing SCS package

[coiacy]

when I try to use the SCS package on julia0.6, it returns the following error:

julia> Pkg.build("SCS")
INFO: Building Homebrew
==============================[ ERROR: Homebrew ]===============================

LoadError: LoadError: ArgumentError: Module Unicode not found in current path.
Run Pkg.add("Unicode") to install the Unicode package.
while loading /Users/XXX/.julia/v0.6/Homebrew/src/Homebrew.jl, in expression starting on line 4
while loading /Users/XXX/.julia/v0.6/Homebrew/deps/build.jl, in expression starting on line 2

================================================================================
INFO: Building SCS
=================================[ ERROR: SCS ]=================================

LoadError: LoadError: ArgumentError: Module Unicode not found in current path.
Run Pkg.add("Unicode") to install the Unicode package.
while loading /Users/XXX/.julia/v0.6/Homebrew/src/Homebrew.jl, in expression starting on line 4
while loading /Users/XXX/.julia/v0.6/SCS/deps/build.jl, in expression starting on line 17

================================================================================

================================[ BUILD ERRORS ]================================

WARNING: SCS and Homebrew had build errors.

• packages with build errors remain installed in /Users/XXX/.julia/v0.6
• build the package(s) and all dependencies with Pkg.build("SCS", "Homebrew")
• build a single package by running its deps/build.jl script

================================================================================

I searched for the Unicode package online, but did not find it. Also, in Homebrew.jl there are other unknown packages like "Libdl, InteractiveUtils". Could you advise how to resolve this issue? @staticfloat