diff --git a/srcpkgs/nsgenbind/template b/srcpkgs/nsgenbind/template
index f0fc33f1e0..a4ae1b5471 100644
--- a/srcpkgs/nsgenbind/template
+++ b/srcpkgs/nsgenbind/template
@@ -11,7 +11,7 @@ distfiles="http://download.netsurf-browser.org/libs/releases/${pkgname}-${versio
 checksum=f504336ec5579026825df413216b25ff45c078f5d863815254a5faccce76bd71
 
 do_build() {
-	make ${makejobs} PREFIX=/usr
+	make ${makejobs} FLEX=flex BISON=bison PREFIX=/usr
 }
 do_install() {
 	make PREFIX=/usr DESTDIR=${DESTDIR} install