dub preBuildCommand not working

[Marc via Digitalmars-d-learn]

I added the followiing to my dub.json:

        "preBuildCommand": [
                "C:\\Users\\user003\\Desktop\\Nova pasta\\a.exe",
                "C:\\dm\\bin\\rcc.exe -32 -D__NT__ res.rc -o sources\\res.res"
        ]

But neither command is executed. 
"C:\\Users\\user003\\Desktop\\Nova pasta\\a.exe" is a D 
application created by myself to check if that command is being 
run. It creates a text file when it does run.
What possibily can be?
I've tried:

dub
dub --build=debug
dub --build-release
and
dub clear
then all the build attempts again but none worked. I getting to 
know dub so I still have no idea what can be.