title: Unresolved dependency in SBT: no ivy file found
body: <p>I have an SBT project which uses an internal Nexus repository to fetch some of its dependencies.  When I run <code>update</code>, I see the following warning messages:</p>
  
  <pre><code>[info] Resolving foo.bar.baz#foobar;2.0.1
  ...
  [debug]     The Repo of Interest: no ivy file found for foo.bar.baz#foobar;2.0.1
  [warn]  module not found: foo.bar.baz#foobar;2.0.1
  [warn] ==== local: tried
  ...
  ... several irrelevant repositories omitted...
  ...
  [warn] ==== The Repo of Interest: tried
  [warn]   http://internal.url.com/nexus/content/repositories/releases/foo/bar/baz/foobar/2.0.1/foobar-2.0.1.pom
  ...
  ... some other repositories omitted...
  ...
  </code></pre>
  
  <p>The URL shown above seems like it should work because I can open the pom in my browser without issue (note that I've modified the URL so you'll have to take my word that it works).  <strike>Even more perplexing is the fact that I only see this issue when trying to build on certain machines.</strike>  How do I go about even starting to debug this issue?  Is there any additional logging that I could turn on to get a sense of why SBT/Ivy is ignoring the POM located at the aforementioned URL?</p>
  
  <p>UPDATE: My build.sbt defines the resolvers as follows:</p>
  
  <pre><code>resolvers := Seq(
    ...,
    "The Repo of Interest" at "http://internal.url.com/nexus/content/repositories/releases",
    ...
  )
  </code></pre>
  
  <p>Also the <a href="http://internal.url.com/nexus/content/repositories/releases/foo/bar/baz/foobar/2.0.1" rel="nofollow">http://internal.url.com/nexus/content/repositories/releases/foo/bar/baz/foobar/2.0.1</a> folder has the pom, the jar, the sources jar and the associated md5 and sha1 for all of those files.  The pom file looks like:</p>
  
  <pre><code>&lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt;
    &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
    &lt;groupId&gt;foo.bar.baz&lt;/groupId&gt;
    &lt;artifactId&gt;foobar&lt;/artifactId&gt;
    &lt;version&gt;2.0.1&lt;/version&gt;
    &lt;dependencies&gt;
      ...
    &lt;/dependencies&gt;
  &lt;/project&gt;
  </code></pre>
  
  <p>UPDATE #2: The build only appeared to be working on other machines because they already had a copy of the relevant jar cached under <code>~/.ivy2/cache/foo/bar/baz/foobar/jars</code>.</p>
  
  <p>UPDATE #3: After looking at the logging a little more closely, I believe <code>The Repo of Interest: no ivy file found for foo.bar.baz#foobar;2.0.1</code> is the true error message</p>