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-rw-r--r--Lib/packaging/command/build_ext.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/Lib/packaging/command/build_ext.py b/Lib/packaging/command/build_ext.py
index 99cf8ce..7aa0b3a 100644
--- a/Lib/packaging/command/build_ext.py
+++ b/Lib/packaging/command/build_ext.py
@@ -182,7 +182,10 @@ class build_ext(Command):
# the 'libs' directory is for binary installs - we assume that
# must be the *native* platform. But we don't really support
# cross-compiling via a binary install anyway, so we let it go.
- self.library_dirs.append(os.path.join(sys.exec_prefix, 'libs'))
+ # Note that we must use sys.base_exec_prefix here rather than
+ # exec_prefix, since the Python libs are not copied to a virtual
+ # environment.
+ self.library_dirs.append(os.path.join(sys.base_exec_prefix, 'libs'))
if self.debug:
self.build_temp = os.path.join(self.build_temp, "Debug")
else: