[MacPorts] #60074: py37-matplotlib @3.1.3_0+cairo+webagg: importing fails

[MacPorts]

#60074: py37-matplotlib @3.1.3_0+cairo+webagg: importing fails
----------------------------+------------------------
  Reporter:  ladavid        |      Owner:  reneeotten
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.6.2
Resolution:                 |   Keywords:  catalina
      Port:  py-matplotlib  |
----------------------------+------------------------

Comment (by reneeotten):

 okay, I *think* I have found the issue: it seems related to doing parallel
 builds. Likely related to the fact that this was
 [https://github.com/macports/macports-
 ports/commit/8355687eb677dfc77ec34bfb7fdba91337d34b1d#diff-
 6acfaeba4d084735deda0018303cd887 recently enabled by default in the python
 PG].

 For me adding {{{use_parallel_build  no}}} to the Portfile and installing
 from source solved the problem. Can someone please check if that solves
 the issue in your case as well? If someone can confirm this I will commit
 a revised Portfile. Thanks!

-- 
Ticket URL: <https://trac.macports.org/ticket/60074#comment:17>
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