[MacPorts] #59700: SSHKeychain @0.8.2: error: could not decode input file using specified encoding: Western (Mac OS Roman), and the file contents appear to be encoded in Unicode (UTF-8)

[MacPorts]

#59700: SSHKeychain @0.8.2: error: could not decode input file using specified
encoding: Western (Mac OS Roman), and the file contents appear to be
encoded in Unicode (UTF-8)
--------------------------+------------------------
  Reporter:  l-g          |      Owner:  ryandesign
      Type:  defect       |     Status:  reopened
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  catalina
      Port:  SSHKeychain  |
--------------------------+------------------------

Comment (by ryandesign):

 So I think we have fixed this problem, but based on logs from our
 automated build system, there is a new problem:

 {{{
 2019-11-22 06:21:10.496 xcodebuild[96366:36729966] [MT] DVTAssertions:
 Warning in
 /Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-15526.1/IDEFoundation/Buildables/IDEWorkspaceArena.m:1131
 Details:  Failed to create workspace arena at
 <DVTFilePath:0x7fe9c1fdbb00:'/opt/local/var/macports/home/Library/Developer/Xcode/DerivedData
 /SSHKeychain-gxuxkddkovlxzpdgimrkfammrnpe'>: Error
 Domain=NSCocoaErrorDomain Code=513 "You don’t have permission to save the
 file “SSHKeychain-gxuxkddkovlxzpdgimrkfammrnpe” in the folder
 “DerivedData”."
 UserInfo={NSFilePath=/opt/local/var/macports/home/Library/Developer/Xcode/DerivedData
 /SSHKeychain-gxuxkddkovlxzpdgimrkfammrnpe,
 NSUnderlyingError=0x7fe9c6a12f00 {Error Domain=NSPOSIXErrorDomain Code=1
 "Operation not permitted"}}
 Object:   <IDEWorkspaceArena: 0x7fe9c1fc92f0>
 Method:   -createWorkspaceArenaFolderIfNecessary
 Thread:   <NSThread: 0x7fe9c1c136c0>{number = 1, name = main}
 Please file a bug at https://feedbackassistant.apple.com with this warning
 message and any useful information you can provide.
 }}}

 This is #57137. I don't know why nobody has fixed that yet.

-- 
Ticket URL: <https://trac.macports.org/ticket/59700#comment:8>
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