diff --git a/srcpkgs/firefox/template b/srcpkgs/firefox/template
index 2473e0fa5cc..5a0ed12a677 100644
--- a/srcpkgs/firefox/template
+++ b/srcpkgs/firefox/template
@@ -41,13 +41,16 @@ Add_dependency run gtk+
 Add_dependency run xulrunner
 
 Add_dependency build zip
-Add_dependency build perl
-Add_dependency build python
+Add_dependency build perl	">=0"
+Add_dependency build python	">=0"
+Add_dependency build yasm
 Add_dependency build glibc-devel
 Add_dependency build libstdc++-devel
 Add_dependency build xulrunner-devel
 Add_dependency build nspr-devel
 Add_dependency build gtk+-devel
+Add_dependency build libevent-devel
+Add_dependency build hunspell-devel
 
 post_install()
 {