[MacPorts] #59381: port clean not working

[MacPorts]

#59381: port clean not working
--------------------+--------------------
 Reporter:  6aKa    |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:
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 {{{
 zeus local # pwd
 /opt/local
 zeus local # id
 uid=0(root) gid=0(wheel)
 groups=0(wheel),1(daemon),2(kmem),3(sys),4(tty),5(operator),8(procview),9(procmod),12(everyone),20(staff),29(certusers),61(localaccounts),80(admin),701(com.apple.sharepoint.group.1),33(_appstore),98(_lpadmin),100(_lpoperator),204(_developer),250(_analyticsusers),395(com.apple.access_ftp),398(com.apple.access_screensharing),399(com.apple.access_ssh),400(com.apple.access_remote_ae)
 zeus local # port -d version
 DEBUG: Copying /Users/baka/Library/Preferences/com.apple.dt.Xcode.plist to
 /opt/local/var/macports/home/Library/Preferences
 Version: 2.6.1
 zeus local # port -d clean
 DEBUG: Copying /Users/baka/Library/Preferences/com.apple.dt.Xcode.plist to
 /opt/local/var/macports/home/Library/Preferences
 DEBUG: Using normalized porturl file:///opt/local
 DEBUG: Changing to port directory: /opt/local
 DEBUG: Could not find Portfile in /opt/local
     while executing
 "mportopen $url"
 Can't map the URL 'file://.' to a port description file ("Could not find
 Portfile in /opt/local").
 Please verify that the directory and portfile syntax are correct.
 To use the current port, you must be in a port's directory.
 zeus local # xcodebuild -version
 Xcode 11.1
 Build version 11A1027
 }}}

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Ticket URL: <https://trac.macports.org/ticket/59381>
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