[MacPorts] #62572: unison 2.51.2 build error on Catalina 10.15.6, MacPorts 2.6.4 clean install

[MacPorts]

#62572: unison 2.51.2 build error on Catalina 10.15.6, MacPorts 2.6.4 clean install
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 Reporter:  trebitzki  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.6.4
 Keywords:             |       Port:  unison 2.51.2
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 This is my first bug report.

 Seems to bork on line 1039 of main.log:
 :info:build Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_unison/unison/work/unison-2.51.2"
 && /usr/bin/make -w all UISTYLE=gtk2 THREADS=true

 Both paths are correct.

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Ticket URL: <https://trac.macports.org/ticket/62572>
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