--- a/htdig-3.2.0_beta6-r3.ebuild	
+++ a/htdig-3.2.0_beta6-r3.ebuild	
@@ -27,6 +27,8 @@ src_unpack() {
 	epatch "${FILESDIR}"/${P}-gcc4.patch
 	epatch "${FILESDIR}"/${P}-as-needed.patch
 	epatch "${FILESDIR}"/${P}-quoting.patch
+	sed 's/AM_CONFIG_HEADER/AC_CONFIG_HEADERS/g' -i \
+		configure.in db/configure.in
 	eautoreconf
 }