diff -rup importlib-metadata-1.6.0-orig/yproject.toml importlib-metadata-1.6.0/pyproject.toml
--- importlib-metadata-1.6.0-orig/yproject.toml	2021-03-22 22:10:33.000000000 +0100
+++ importlib-metadata-1.6.0/pyproject.toml	2021-03-22 22:11:09.000000000 +0100
@@ -1,3 +1,3 @@
 [build-system]
-requires = ["setuptools>=30.3", "wheel", "setuptools_scm"]
+requires = ["setuptools<42.0", "wheel", "setuptools_scm<6.0.0"]