I've been swimming in the dirty water
I've been swimming where the fish won't go
(The Jesus & Mary Chain, "Dirty Water")
The source archive should be available from the same location where you are supposed to get updates from. Look out for an archive called hsc-source.lha.
The source archive contains a README how to compile the whole stuff. If you basically know how to cope with a C-compiler and a Makefile, there should be no real problem for you.
hsc was written in naked & masochistic ANSI-C. Even
worse, it only uses functions of the standard library and does
not require any Amiga- or Un*x-specific include files like
<dir.h>, <String.h> or functions like ReadArgs(),
stricmp() etc.
This should ensure a maximum of portability. However, the handling of filenames is a system-dependant thing, which has to be adapted for every OS. See also the section about ``Existing Ports''