title: Getting Leiningen running on Mac OS X 10.7.2
body: <p>I installed Leiningen on Mac OS X 10.7.2 via MacPorts:</p>
  
  <pre><code>$ lein version
  Leiningen 1.6.1.1 on Java 1.6.0_29 Java HotSpot(TM) 64-Bit Server VM
  </code></pre>
  
  <p>I also have <code>clojure</code> and <code>clojure-contrib</code> packages installed:</p>
  
  <pre><code>$ sudo port installed clojure*
  The following ports are currently installed:
    clojure @1.3.0_0 (active)
    clojure-contrib @1.2.0_0 (active)
  </code></pre>
  
  <p>To test my environment, I generated a sample <code>helloworld</code> project, <a href="http://zef.me/2470/building-clojure-projects-with-leiningen" rel="nofollow">as described here by Zef Hemel</a>. Here is the <code>project.clj</code> file:</p>
  
  <pre><code>(defproject helloworld "0.1"
      :dependencies [[org.clojure/clojure
                        "1.3.0-master-SNAPSHOT"]
                     [org.clojure/clojure-contrib
                        "1.2.0-SNAPSHOT"]]
      :main helloworld)
  </code></pre>
  
  <p>And here is the <code>helloworld.clj</code> file:</p>
  
  <pre><code>(ns helloworld
    (:gen-class))
  
  (defn -main [&amp; args]
    (println "Hello world!"))
  </code></pre>
  
  <p>When I try to compile this project, I get several update messages...</p>
  
  <pre><code>$ pwd
  /Users/alexreynolds/helloworld
  
  $ sudo lein compile
  [INFO] snapshot org.clojure:clojure:1.3.0-master-SNAPSHOT: checking for updates from clojars
  Downloading: org/clojure/clojure/1.3.0-master-SNAPSHOT/clojure-1.3.0-master-SNAPSHOT.pom from clojars
  [INFO] snapshot org.clojure:clojure-contrib:1.2.0-SNAPSHOT: checking for updates from clojars
  Downloading: org/clojure/clojure-contrib/1.2.0-SNAPSHOT/clojure-contrib-1.2.0-SNAPSHOT.pom from clojars
  Downloading: org/clojure/clojure/1.3.0-master-SNAPSHOT/clojure-1.3.0-master-SNAPSHOT.jar from clojars
  Downloading: org/clojure/clojure-contrib/1.2.0-SNAPSHOT/clojure-contrib-1.2.0-SNAPSHOT.jar from clojars
  </code></pre>
  
  <p>...and then a whole bunch of errors:</p>
  
  <pre><code>An error has occurred while processing the Maven artifact tasks.
   Diagnosis:
  
  Unable to resolve artifact: Missing:
  ----------
  1) org.clojure:clojure:jar:1.3.0-master-SNAPSHOT
  
    Try downloading the file manually from the project website.
  
    Then, install it using the command:
        mvn install:install-file -DgroupId=org.clojure -DartifactId=clojure -Dversion=1.3.0-master-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file
  
    Alternatively, if you host your own repository you can deploy the file there:
        mvn deploy:deploy-file -DgroupId=org.clojure -DartifactId=clojure -Dversion=1.3.0-master-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
  
    Path to dependency:
          1) org.apache.maven:super-pom:jar:2.0
          2) org.clojure:clojure:jar:1.3.0-master-SNAPSHOT
  
  2) org.clojure:clojure-contrib:jar:1.2.0-SNAPSHOT
  
    Try downloading the file manually from the project website.
  
    Then, install it using the command:
        mvn install:install-file -DgroupId=org.clojure -DartifactId=clojure-contrib -Dversion=1.2.0-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file
  
    Alternatively, if you host your own repository you can deploy the file there:
        mvn deploy:deploy-file -DgroupId=org.clojure -DartifactId=clojure-contrib -Dversion=1.2.0-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
  
    Path to dependency:
          1) org.apache.maven:super-pom:jar:2.0
          2) org.clojure:clojure-contrib:jar:1.2.0-SNAPSHOT
  
  ----------
  2 required artifacts are missing.
  
  for artifact:
    org.apache.maven:super-pom:jar:2.0
  
  from the specified remote repositories:
    clojars (http://clojars.org/repo/),
    central (http://repo1.maven.org/maven2)
  
  ----------
  2 required artifacts are missing.
  
  for artifact:
    org.apache.maven:super-pom:jar:2.0
  
  from the specified remote repositories:
    clojars (http://clojars.org/repo/),
    central (http://repo1.maven.org/maven2)
  
   (NO_SOURCE_FILE:0)
          at clojure.lang.Compiler.eval(Compiler.java:5440)
          at clojure.lang.Compiler.eval(Compiler.java:5391)
          at clojure.core$eval.invoke(core.clj:2382)
          at clojure.main$eval_opt.invoke(main.clj:235)
          at clojure.main$initialize.invoke(main.clj:254)
          at clojure.main$script_opt.invoke(main.clj:270)
          at clojure.main$main.doInvoke(main.clj:354)
          at clojure.lang.RestFn.invoke(RestFn.java:457)
          at clojure.lang.Var.invoke(Var.java:377)
          at clojure.lang.AFn.applyToHelper(AFn.java:172)
          at clojure.lang.Var.applyTo(Var.java:482)
          at clojure.main.main(main.java:37)
  Caused by: Unable to resolve artifact: Missing:
  ----------
  1) org.clojure:clojure:jar:1.3.0-master-SNAPSHOT
  
    Try downloading the file manually from the project website.
  
    Then, install it using the command:
        mvn install:install-file -DgroupId=org.clojure -DartifactId=clojure -Dversion=1.3.0-master-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file
  
    Alternatively, if you host your own repository you can deploy the file there:
        mvn deploy:deploy-file -DgroupId=org.clojure -DartifactId=clojure -Dversion=1.3.0-master-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]
  
    Path to dependency:
          1) org.apache.maven:super-pom:jar:2.0
          2) org.clojure:clojure:jar:1.3.0-master-SNAPSHOT
  
  2) org.clojure:clojure-contrib:jar:1.2.0-SNAPSHOT
  
    Try downloading the file manually from the project website.
  
  ...
  
  ----------
  2 required artifacts are missing.
  
  for artifact:
    org.apache.maven:super-pom:jar:2.0
  
  from the specified remote repositories:
    clojars (http://clojars.org/repo/),
    central (http://repo1.maven.org/maven2)
  
  
      at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTransitively(DefaultArtifactResolver.java:324)
          at org.apache.maven.artifact.ant.DependenciesTask.doExecute(DependenciesTask.java:170)
      ... 38 more
  </code></pre>
  
  <p>I have tried to <code>self-install</code>:</p>
  
  <pre><code>$ sudo lein self-install
  Downloading Leiningen now...
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                   Dload  Upload   Total   Spent    Left  Speed
  100 9161k  100 9161k    0     0  1889k      0  0:00:04  0:00:04 --:--:-- 2580k
  </code></pre>
  
  <p>But on the second attempt to <code>compile</code>, I get the same warnings and errors.</p>
  
  <p>What should I try in order to fix this? Thanks for your advice.</p>