diff --git a/pkgs/by-name/de/debian-devscripts/package.nix b/pkgs/by-name/de/debian-devscripts/package.nix
index 1d7fe8078d25..4480df22767d 100644
--- a/pkgs/by-name/de/debian-devscripts/package.nix
+++ b/pkgs/by-name/de/debian-devscripts/package.nix
@@ -91,6 +91,7 @@ stdenv.mkDerivation (finalAttrs: {
     IPCRun
     FileDirList
     FileTouch
+    IOString
   ]);
 
   preConfigure = ''