[MonoDevelop] Cannot rebuild due to file permissions in build dir

[Len Charest]

Since upgrading to MD 2.4.2, I've had problems with rebuilding projects. On
initial build, some files (DLLs) are copied into the build directory as
read-only (perms 0444). On subsequent rebuild, MD complains that it does not
have permission to delete the files from the build directory, and the build
fails.

Manually running "chmod +w *" (or "rm -f ./*") in the build directory allows
the rebuild to succeed, but it's not a viable solution. Neither of these
commands can be used as pre-build actions since actions are run *after* the
MD build system attempts to clean the build directory.

Is this a known problem and is there a work-around?

Some additional info: I'm running MD 2.4.2 on a MacBook Pro with MacOS
10.6.6. I also have the latest Mono and MonoTouch bits.

Here's the detail of one of the errors I see when rebuilding a project that
is not under version control:

System.UnauthorizedAccessException: Access to the path
"/full/path/to/project/builddir/System.Data.Services.Client.dll" is denied.
  at System.IO.File.Delete (System.String path) [0x00000] in <filename
unknown>:0
  at MonoDevelop.Core.FileSystem.DefaultFileSystemExtension.DeleteFile
(System.String file) [0x00000] in <filename unknown>:0
  at MonoDevelop.Core.FileService.DeleteFile (System.String fileName)
[0x00000] in <filename unknown>:0

Here's an error detail for a project that is under SVN control:

System.UnauthorizedAccessException: Access to the path
"/full/path/to/project/builddir/System.Data.Services.Client.dll" is denied.
  at System.IO.File.Delete (System.String path) [0x00000] in <filename
unknown>:0
  at MonoDevelop.VersionControl.Subversion.SubversionRepository.DeleteFiles
(MonoDevelop.Core.FilePath[] paths, Boolean force, IProgressMonitor monitor)
[0x00000] in <filename unknown>:0
  at MonoDevelop.VersionControl.Repository.DeleteFile (FilePath localPath,
Boolean force, IProgressMonitor monitor) [0x00000] in <filename unknown>:0
  at MonoDevelop.VersionControl.VersionControlFileSystemExtension.DeleteFile
(System.String file) [0x00000] in <filename unknown>:0
  at MonoDevelop.Core.FileService.DeleteFile (System.String fileName)
[0x00000] in <filename unknown>:0

The latter stack trace is odd to me because the build directory itself is
not under version control.

Thanks,
Len
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