diff --git a/setup.py b/setup.py
index 0825241..389a59e 100755
--- a/setup.py
+++ b/setup.py
@@ -11,12 +11,7 @@ extension_modules = []
 
 
 def get_boost_version(out=None):
-    if out is None:
-        out = subprocess.check_output(
-            r"ldconfig -p | grep -E 'libboost_python.*\.so '", shell=True)
-
-    ver = os.path.splitext(out.split()[0][3:])[0].decode()
-    return ver
+    return "@boost_version@"
 
 def tests():
     # case: python3-py3x.so