This section provides some notes on how to hack on Hydra. To get the latest version of Hydra from GitHub: $ git clone git://github.com/NixOS/hydra.git $ cd hydra To build it and its dependencies: $ nix-build release.nix -A build.x86_64-linux To build all dependencies and start a shell in which all environment variables (such as PERL5LIB) are set up so that those dependencies can be found: $ nix-shell To build Hydra, you should then do: [nix-shell]$ ./bootstrap [nix-shell]$ configurePhase [nix-shell]$ make You can run the Hydra web server in your source tree as follows: $ ./src/script/hydra-server