diff --git a/build-aux/snarf-c2h.scm b/build-aux/snarf-c2h.scm
index 10ca880..edc933c 100755
--- a/build-aux/snarf-c2h.scm
+++ b/build-aux/snarf-c2h.scm
@@ -1,5 +1,5 @@
-#!/usr/local/bin/guile \
--e c2h -s
+#!/bin/sh
+guile -e c2h -s
 !#
 ;;; output.scm  --  Output documentation "snarffed" from C files in Texi/GDF.
 ;;;