# ninja > A Build system designed to be fast. > More information: . - Build in the current directory: `ninja` - Build in the current directory, executing 4 jobs at a time in parallel: `ninja -j {{4}}` - Build a program in a given directory: `ninja -C {{path/to/directory}}` - Show targets (e.g. `install` and `uninstall`): `ninja -t targets` - Display help: `ninja -h`