python3Packages.wavefile: unbreak

diff --git a/wavefile/libsndfile.py b/wavefile/libsndfile.py

index 67f0a46..ce066ee 100644

index 89c670f..fa19e1d 100644

--- a/wavefile/libsndfile.py

+++ b/wavefile/libsndfile.py

@@ -19,11 +19,11 @@ import numpy as np

 if sys.platform == "win32":

     dllName = 'libsndfile-1'

 elif "linux" in sys.platform:

-    dllName = 'libsndfile.so.1'

+    dllName = '@libsndfile@'

 elif "cygwin" in sys.platform:

     dllName = 'libsndfile-1.dll'

 elif "darwin" in sys.platform:

-    dllName = 'libsndfile.dylib'

+    dllName = '@libsndfile@'

 else:

     dllName = 'libsndfile'

@@ -17,20 +17,7 @@ import ctypes as ct

 import numpy as np

 def _libfilename():

-    for system, libname in [

-        ('win32', 'libsndfile-1'),

-        ('cygwin', 'libsndfile-1.dll'),

-        ('darwin', 'libsndfile.dylib'),

-        ('linux', 'libsndfile.so.1'),

-        ('freebsd', 'libsndfile.so.1'),

-        ('', 'libsndfile'),

-    ]:

-        if system in sys.platform:

-            return libname

-    raise Exception(

-        'No libsndfile dll name mapping for platform {}.'

-        .format(sys.platform)

-    )

+    return "@libsndfile@"

 dllName = _libfilename()

 _lib=None