There is a new version of biew. I tried to adapt existing ebuild. It compiles and works, but I didn't checked carefully. Reproducible: Always Steps to Reproduce:
Created attachment 220255 [details] quick and dirty, but seems to work
+ 21 Feb 2010; Patrick Lauer <patrick@gentoo.org> +biew-6.1.0.ebuild: + Bump for #305809