Use the base package name as the provided value, rather than the path, because…

Use the base package name as the provided value, rather than the path, because .deb packages can't start with /

rakefile

@@ -65,7 +65,7 @@ task :package do
             "--depends=python-markdown",
             "--depends=python-pygments",
             "--depends=mysql-client",
-            "--provides=#{LINK_PATH}",
+            "--provides=#{PACKAGE_NAME}",
             "--name=#{DEPLOY_NAME}",
             "--version=#{VERSION}",
             "-a", "all",