OpenSSH's builtin entropy gathering is long gone.
diff --git a/INSTALL b/INSTALL
index f00b276..2e78104 100644
--- a/INSTALL
+++ b/INSTALL
@@ -169,13 +169,11 @@
--with-prngd-socket=/some/file allows you to enable EGD or PRNGD
support and to specify a PRNGd socket. Use this if your Unix lacks
-/dev/random and you don't want to use OpenSSH's builtin entropy
-collection support.
+/dev/random.
--with-prngd-port=portnum allows you to enable EGD or PRNGD support
and to specify a EGD localhost TCP port. Use this if your Unix lacks
-/dev/random and you don't want to use OpenSSH's builtin entropy
-collection support.
+/dev/random.
--with-lastlog=FILE will specify the location of the lastlog file.
./configure searches a few locations for lastlog, but may not find