Port: www/nuvolaplayer-8tracks.
It builds 'textproc/lasem' ss dependensies  and uses 'lasem-render' for converting icons.
A converting script './svg-convert.sh' contains the following block:

case $CONVERT in
        lasem-render*)
                source_size=$($CONVERT --debug render "${source_file}" -o /dev/null | awk '/width/ { print $3 }')
                zoom_factor=$(divide ${dest_size} ${source_size})
                echo $CONVERT -z ${zoom_factor} "${source_file}" -o "${dest_file}"
                $CONVERT -z ${zoom_factor} "${source_file}" -o "${dest_file}"
                ;;

In case a russian locale (I belive that there are other) a decimal point is a comma (not a dot) and following variable gets a value in unacceptable format (with comma as a floating point):
zoom_factor=$(divide ${dest_size} ${source_size})

As a solution, I used: LC_NUMERIC=C make

But why not change the language temporarily in a './svg-convert.sh' or a Makefile directly?