--- configure.orig	2015-07-24 11:39:35.000000000 -0700
+++ configure	2020-04-21 18:27:38.000000000 -0700
@@ -15122,7 +15122,7 @@
 
 
 
-GUILE_VERSION="`guile-config info guileversion | sed -r 's,\\.[0-9]+$,,'`"
+GUILE_VERSION="`guile-config info guileversion | sed -e 's,\\.[0-9]+$,,'`"
 # Extract the first word of "guile-$GUILE_VERSION", so it can be a program name with args.
 set dummy guile-$GUILE_VERSION; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
