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src/virtualenv/activation/python/activate_this.py

@@ -25,7 +25,7 @@
 # prepend bin to PATH (this file is inside the bin directory)
 os.environ["PATH"] = os.pathsep.join([bin_dir, *os.environ.get("PATH", "").split(os.pathsep)])
 os.environ["VIRTUAL_ENV"] = base  # virtual env is right above bin directory
-os.environ["VIRTUAL_ENV_PROMPT"] = "__VIRTUAL_PROMPT__" or os.path.basename(base)
+os.environ["VIRTUAL_ENV_PROMPT"] = "__VIRTUAL_PROMPT__"
 
 # add the virtual environments libraries to the host python import mechanism
 prev_length = len(sys.path)