$OpenBSD$

Index: setup_support.py
--- setup_support.py.orig
+++ setup_support.py
@@ -68,7 +68,7 @@ def _find_lib():
     ffi = FFI()
     try:
         ffi.dlopen('secp256k1')
-        if os.path.exists('/usr/include/secp256k1_ecdh.h'):
+        if os.path.exists(os.path.join(os.environ['LOCALBASE'], 'include/secp256k1_ecdh.h')):
             return True
         else:
             # The system library lacks the ecdh module
