nmake not found while trying to create a NSIS installer for windows on wireshark?

Hello,

I am trying to create a NSIS installer for my wireshark which I have compiled from source code. I have changed the config.nmake file to include the path where nsis.exe is installed.

Now when I try to create the installer using 'nmake -f Makefile.nmake packaging' I get this error.

'nmake' is not recognized as an internal or external command, operable program or batch file.

However, before creating the installer, I compiled using nmake -f Makefile.nmake make all'. I did not face any problems with nmake then. What should be done??

Thanks,

Sid