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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def find_DST():
 """Find where this package should be installed to. """

    if SYS_NAME == "Windows":
        return os.path.join(site.getsitepackages()[1], PKG_NAME)
    elif SYS_NAME in ["Darwin", "Linux"]:
        return os.path.join(site.getsitepackages()[0], PKG_NAME)