diff --git a/pkgs/development/libraries/celt/generic.nix b/pkgs/development/libraries/celt/generic.nix
index 3b47b1d5e72..1ddc016d66b 100644
--- a/pkgs/development/libraries/celt/generic.nix
+++ b/pkgs/development/libraries/celt/generic.nix
@@ -12,6 +12,8 @@ stdenv.mkDerivation {
 
   inherit src;
 
+  outputs = [ "out" "dev" ];
+
   inherit prePatch;
 
   buildInputs = []