diff --git a/pkgs/top-level/build-for-release.nix b/pkgs/top-level/build-for-release.nix
index b6546e2026d..ee089db960d 100644
--- a/pkgs/top-level/build-for-release.nix
+++ b/pkgs/top-level/build-for-release.nix
@@ -95,6 +95,7 @@ let {
     rssglx
     screen
     sdf
+    spidermonkey
     strace
     strategoxt
     strategoxtUtils
@@ -165,6 +166,7 @@ let {
     maven
     nxml
     php
+    spidermonkey
     subversion
     tetex
     unzip