At least for me it works, just those steps (as you outlined already):
mkdir build && cd build
cmake -DCMAKE_INSTALL_PREFIX=/opt/darktable -DBUILD_NOISE_TOOLS=ON ..
sudo make install
Somewhere during the build process you should come across this output:
Scanning dependencies of target darktable-noiseprofile
[ 9%] Building C object share/darktable/tools/noise/CMakeFiles/darktable-noiseprofile.dir/noiseprofile.c.o
After successfull build & installation you should find the noise calibration tools here: /opt/darktable/libexec/darktable/tools