I think this fixes #1614. It could use tests though.
Handle mixed case package names. I think this fixes #1614. It could use tests though.
This patch is integrated upstream in scikit-image 0.18.0
--- a/setup.py	2019-04-01 22:30:11.000000000 +0000
+++ b/setup.py	2020-12-16 06:21:52.600722138 +0000
@@ -67,6 +67,7 @@
 class ConditionalOpenMP(build_ext):
 
     def can_compile_link(self):
+        return False
 
         cc = self.compiler
         fname = 'test.c'

This patch is integrated upstream in scikit-image 0.18.0
--- a/setup.py	2019-04-01 22:30:11.000000000 +0000
+++ b/setup.py	2020-12-16 06:21:52.600722138 +0000
@@ -67,6 +67,7 @@
 class ConditionalOpenMP(build_ext):
 
     def can_compile_link(self):
+        return False
 
         cc = self.compiler
         fname = 'test.c'
