Typo in Linux build command?

[snhirsch]

On Ubuntu 18.04 this command is not valid:

cmake -G "Unix Makefiles" --build ..

The double-dash on the build token seems spurious and it works without it, e.g.:

cmake -G "Unix Makefiles" build ..

[rramphal]

I had to change it from:

cmake -G "Unix Makefiles" --build ..

to

cmake -G "Unix Makefiles" ..
cmake --build .