Usage

  cd /etc/portage
  mkdir -p 3rd-party
  cd 3rd-party
  git clone https://github.com/gentoo-perl/perl-testing-profiles
  cd /etc/portage
  mkdir profile
  cd profile
  for i in package.{accept_keywords,mask,unmask,provided,use}; do
    (
      mkdir -p "${i}" && \
        cd "${i}"     && \
        cp -s -t .  ../../3rd-party/perl-testing-profiles/5.26.9999/profile/"${i}"/*
    )
  done
  cd ..
  for i in env package.env; do
    (
      mkdir -p "${i}" && \
        cd "${i}"     && \
        cp -s -t .  ../3rd-party/perl-testing-profiles/5.26.9999/"${i}"/*
    )
  done