[MacPorts] #62392: py-mpmath: build fails with "No matching distribution found for setuptools_scm>=1.7.0"

[MacPorts]

#62392: py-mpmath: build fails with "No matching distribution found for
setuptools_scm>=1.7.0"
-------------------------+-----------------------
 Reporter:  michaellass  |      Owner:  (none)
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  py-mpmath
-------------------------+-----------------------
 Trying to update py38-mpmath or py39-mpmath to version 1.2.1 fails with
 the following error:

 {{{
 WARNING: The wheel package is not available.
 WARNING: The index url "''" seems invalid, please provide a scheme.
 WARNING: Url '''/setuptools-scm/' is ignored. It is either a non-existing
 path or lacks a specific scheme.
 WARNING: Url '''' is ignored. It is either a non-existing path or lacks a
 specific scheme.
 ERROR: Could not find a version that satisfies the requirement
 setuptools_scm>=1.7.0
 ERROR: No matching distribution found for setuptools_scm>=1.7.0
 }}}

 Installing py3*-wheel only gets rid of the first warning but does not
 change the error.

 Full build.log is attached.

-- 
Ticket URL: <https://trac.macports.org/ticket/62392>
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