I was once the maintainer of pstk. But I can tell you that I haven't touched it in years, and it fell off of SourceForge in one of their restructurings, so I have no intention of looking at it again.
Several years ago someone, I don't recall who, forked pstk for Chicken. I was not involved in the fork, and I don't know what changes were made. I'm pretty sure the Chicken version of pstk hasn't been maintained for a long time, either.
I am not a regular user of Chicken and am not interested in being the maintainer of Chicken pstk.