+For building on Unix:
+
+ - unix/Makefile.gtk is for Unix and GTK. If you don't have GTK, you
+ should still be able to build the command-line utilities (PSCP,
+ PSFTP, Plink, PuTTYgen) using this makefile. The makefile expects
+ you to change into the `unix' subdirectory, then run `make -f
+ Makefile.gtk'. Note that Unix PuTTY has mostly only been tested
+ on Linux so far; portability problems such as BSD-style ptys or
+ different header file requirements are expected.
+