diff --git a/release.nix b/release.nix
index 8b027ec2..3ca9a70e 100644
--- a/release.nix
+++ b/release.nix
@@ -68,6 +68,7 @@ let
           perlXMLSimple
           perlIPCRun
           perlIOCompressBzip2
+          perlReadonly
         ];
 
         preUnpack = ''