Support other language such as Julia?

it looks like if I install and then rm -rf tmp/ install/, then try to run lcgcmake configure --compiler=gcc8 --version=dev3python3 --prefix=../install again, it wil error out:

Installing CMake version 3.11.1
CMake Error at .../Documents/gitlab/install/cmake-3.11.1-Linux-x86_64/share/cmake-3.11/Modules/CMakeDetermineCCompiler.cmake:48 (message):
  Could not find compiler set in environment variable CC:

  
  .../Documents/gitlab/install/gcc/8.2.0-3fa06/x86_64-centos7/bin/gcc.
Call Stack (most recent call first):
  CMakeLists.txt:2 (project)

Something happened to my local environment when the first install configured gcc8?

EDIT: I see it probably has something to do with https://gitlab.cern.ch/jiling/lcgcmake/blob/master/bin/lcgcmake#L370 things I have gcc8