Compiling fails near the end

when i try to do the part where you do “cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLAF_BACKEND=skia -DSKIA_DIR=C:\deps\skia -DSKIA_LIBRARY_DIR=C:\deps\skia\out\Release-x86 -G Ninja …” and it says ‘‘cmake’’ is not recognized as an internal or external command,
operable program or batch file." and i have not found anything