Set project name to UNKNOWN when empty

For compatibility with distutils
pypa · Apr 24, 2021 · c157449 · c157449
1 parent 75ba96c
commit c157449
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diff --git a/news/9838.bugfix.rst b/news/9838.bugfix.rst
@@ -0,0 +1 @@
+Fix compatibility between distutils and sysconfig when the project name is unknown.
diff --git a/src/pip/_internal/locations/_sysconfig.py b/src/pip/_internal/locations/_sysconfig.py
@@ -139,7 +139,7 @@ def get_scheme(
     scheme = Scheme(
         platlib=paths["platlib"],
         purelib=paths["purelib"],
-        headers=os.path.join(paths["include"], dist_name),
+        headers=os.path.join(paths["include"], dist_name or "UNKNOWN"),
         scripts=paths["scripts"],
         data=paths["data"],
     )
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Fix compatibility between distutils and sysconfig when the project name is unknown.