I could not find any ready-to-install picolisp-Package for the raspberry Pi.
Instead, with the help of this list, by searching
firstname.lastname@example.org for the 'arm'-Thread as of
March 2013, which was discussed by Tomas, Rick and Alex,
it was an ease of changing the Makefile and compile successfully PiL
126.96.36.199 C without any troubles (Raspbian and ArchLinux).
Additionally, the hint concerning IPv4 immediately directed me to use
Archlinux for that raspberry box, so that picolisp can act as a
Raspberry-Pi(L)server as well.
Great! Thanks for posting that.