# building with ruby-bootstrap in /opt/ruby-xxx, but install into /usr
# and depend on 'rust'
makedepends=(ruby-bootstrap)

# create /opt/ruby-xxx/bin
# install to final destination in /usr and not into /opt/ruby-xxx
eval "$(
  declare -f package | \
    sed '
      /_gemdir/ a mkdir -p "${pkgdir}"/usr/bin
    '
)"