+@if not defined NASM_PREFIX (\r
+ @echo.\r
+ @echo WARNING : NASM_PREFIX environment variable is not set\r
+ @if exist "C:\nasm\nasm.exe" @set "NASM_PREFIX=C:\nasm\"\r
+ @if exist "C:\nasm\nasm.exe" @echo Found nasm.exe, setting the environment variable to C:\nasm\\r
+ @if not exist "C:\nasm\nasm.exe" echo Attempting to build modules that require NASM will fail.\r
+)\r