The info in the link you provided to "Building Clojure Projects with Leiningen" is out of date. After installing Leiningen, at the command line: lein new

The info in the link you provided to "Building Clojure Projects with Leiningen" is out of date. After installing Leiningen, at the command line: lein new <project name> ... and that takes care of creating your project directories and the aforementioned 'project.clj' file.