Index: head/kerberos5/usr.bin/krb5-config/Makefile
===================================================================
--- head/kerberos5/usr.bin/krb5-config/Makefile
+++ head/kerberos5/usr.bin/krb5-config/Makefile
@@ -5,8 +5,12 @@
 
 CLEANFILES= krb5-config
 
+# In order for this to work on MacOS we need to set LC_ALL=C since the
+# krb5-config.in file contains characters that will be rejected by MacOS with
+# a UTF-8 locale (see https://stackoverflow.com/a/23584470/894271)
+# TODO: Should we just require LC_ALL=C during the build?
 krb5-config: krb5-config.in
-	sed -e "s,@PACKAGE@,FreeBSD heimdal,g" \
+	env LC_ALL=C sed -e "s,@PACKAGE@,FreeBSD heimdal,g" \
 	    -e "s,@VERSION@,1.1.0,g" \
 	    -e "s,@prefix@,/usr,g" \
 	    -e "s,@exec_prefix@,/usr,g" \