I notice a couple of things, the article refers to chicken's bin directoy, however the chicken 4.6.0 and 4.6.3 source I have downloaded does not have a bin directory, I have two folders manual & tests.
After installing MIngw I ran the code
C:\>mingw32-make PLATFORM=mingw PREFIX=c:/chicken mingw32-make: *** No targets specified and no makefile found. Stop.
But I cannot seem to get chicken to build even though there are the makefiles in my chicken directory and mingw and c:\chicken is in my path.