make sure that C:\cygwin64\bin (or wherever you installed cygwin) is in your PATH variable.
make.exe should be available in this folder. If not, run the cygwin installation again and install the make environment (step 1h in the pdf).
make sure that C:\cygwin64\bin (or wherever you installed cygwin) is in your PATH variable.
make.exe should be available in this folder. If not, run the cygwin installation again and install the make environment (step 1h in the pdf).