Restore pyproject.toml hack; Looks like this issue is still unresolved

Author: etjones

pyproject.toml

@@ -46,6 +46,14 @@ tox = "^tox 3.11"
 [build-system]
 requires = [
     "poetry>=0.12",
+    # See https://github.com/pypa/setuptools/issues/2353#issuecomment-683781498
+    # for the rest of these requirements, 
+    # -ETJ 31 December 2020
+    "setuptools>=30.3.0,<50",
+    "wheel",
+    "pytest-runner",
+    "setuptools_scm>=3.3.1",
+
 ]
 
 build-backend = "poetry.masonry.api"