$ banshee
Add-in could not be loaded: The required addin 'Banshee.Core,1.0' is not installed.
Mono.Addins.MissingDependencyException: The required addin 'Banshee.Core,1.0' is not installed.
at Mono.Addins.AddinSessionService.ResolveLoadDependencies (System.Collections.ArrayList addins, System.Collections.Stack depCheck, System.String id, Boolean optional) [0x00000]
at Mono.Addins.AddinSessionService.ResolveLoadDependencies (System.Collections.ArrayList addins, System.Collections.Stack depCheck, System.String id, Boolean optional) [0x00000]
[Warn 20:41:51.013] Extension `/Banshee/ServiceManager/Service/__nid_4' not started: The required addin 'Banshee.Core,1.0' is not installed.
[Info 20:41:51.353] All services are started 4.148037s
System.ComponentModel.Win32Exception: ApplicationName='gmcs', CommandLine='/target:library /debug- /optimize+ /out:"/tmp/7be7b31d/2a0fbfae.dll" /r:"/usr/lib/mono/2.0/mscorlib.dll" /r:"System.dll" /r:"System.Xml" /r:"System.Data" -- "/tmp/7be7b31d/2a0fbfae.cs" ', CurrentDirectory='', PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
at System.Diagnostics.Process.Start_noshell (System.Diagnostics.ProcessStartInfo startInfo, System.Diagnostics.Process process) [0x00000]
at System.Diagnostics.Process.Start_common (System.Diagnostics.ProcessStartInfo startInfo, System.Diagnostics.Process process) [0x00000]
at System.Diagnostics.Process.Start () [0x00000]
at (wrapper remoting-invoke-with-check) System.Diagnostics.Process:Start ()
at Mono.CSharp.CSharpCodeCompiler.CompileFromFileBatch (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x00000]
at Mono.CSharp.CSharpCodeCompiler.CompileAssemblyFromFileBatch (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x00000]
at Mono.CSharp.CSharpCodeCompiler.CompileAssemblyFromFile (System.CodeDom.Compiler.CompilerParameters options, System.String fileName) [0x00000]
at System.Xml.Serialization.XmlSerializer.GenerateSerializers (System.Xml.Serialization.GenerationBatch batch, System.CodeDom.Compiler.CompilerParameters cp) [0x00000]
at System.Xml.Serialization.XmlSerializer.RunSerializerGeneration (System.Object obj) [0x00000]