gnu: python-pyclipper: Update to 1.3.0.post6.

* gnu/packages/python-xyz.scm (python-pyclipper): Update to 1.3.0.post6.
[source]: Switch to git-fetch, remove snippet.
[build-system]: Switch to pyproject-build-system.
[arguments]<#:phases>: Add phase 'set-version.
[native-inputs]: Add python-setuptools, remove python-pytest-runner.

Change-Id: Iec0229e6941fdd24c0624c40c4cc5b70935c2165
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

gnu/packages/python-xyz.scm

@@ -28047,28 +28047,30 @@ definitions to simplify the use of C bindings.")
 (define-public python-pyclipper
   (package
     (name "python-pyclipper")
-    (version "1.3.0.post3")
+    (version "1.3.0.post6")
     (source
      (origin
-       (method url-fetch)
-       (uri (pypi-uri "pyclipper" version))
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/greginvm/pyclipper")
+             (commit version)))
+       (file-name (git-file-name name version))
        (sha256
-        (base32 "0vqzbmq2di1jaj6230m5i1ld0mg6wdb1c6r6i5zli54varavr7v3"))
-      (modules '((guix build utils)))
-      (snippet
-       '(begin
-          ;; This file is generated by Cython.
-          (delete-file "src/pyclipper/_pyclipper.cpp") #t))))
+        (base32 "1ijr7sx3203b3ppvsn1zyy8nfz93nbi60l8dxj2hdd6sj25g8q5k"))))
     (build-system pyproject-build-system)
     (arguments
-     `(#:phases
-       (modify-phases %standard-phases
+     (list
+      #:phases
+      #~(modify-phases %standard-phases
+          (add-after 'unpack 'set-version
+            (lambda _
+              (setenv "SETUPTOOLS_SCM_PRETEND_VERSION" #$version)))
           (add-before 'build 'cythonize-sources
             (lambda _
               (with-directory-excursion "src/pyclipper"
                 (invoke "cython" "--cplus" "_pyclipper.pyx")))))))
     (native-inputs
-     (list python-cython-0
+     (list python-cython
            python-pytest
            python-setuptools
            python-setuptools-scm))