The syntax for NMAKE is:
NMAKE builds only specified targets or, if none is specified, the first target in the makefile is used. The first makefile target can be a pseudotarget (a label used in place of a filename in a dependency line) that builds other targets. NMAKE uses makefiles specified with the /F option. If /F is not specified, it uses the MAKEFILE file in the current directory. If no makefile is specified, it uses inference rules to build command-line targets.
The commandfile text file contains command-line input. Other input can precede or follow @commandfile. A path is permitted. In commandfile, line breaks are treated as spaces. Enclose macro definitions in quotation marks if they contain spaces.
For more information: