"/c/delete" in perl is the same as "C:delete" in AmigaDOS. "../../doc" in perl is the same as "//doc" in AmigaDOS.If you really hate this behavior (IMHO, it's a feature), you can reconfigure ixemul.library with the ixconfig stuff from the GCC distribution.
Another caveat is that many Unix perl scripts will expect certain standard Unix tools to exist. I suggest hunting down any Unix work-alike tools you can find and putting them in BIN:. If anyone comes up with a good set of freely distributable ones, let me know and maybe we can include them in future binary distributions.