diff --git a/pkgs/by-name/io/ioping/package.nix b/pkgs/by-name/io/ioping/package.nix
index 5847a7a261b9..125a3ab42eb2 100644
--- a/pkgs/by-name/io/ioping/package.nix
+++ b/pkgs/by-name/io/ioping/package.nix
@@ -17,6 +17,11 @@ stdenv.mkDerivation (finalAttrs: {
 
   makeFlags = [ "PREFIX=$(out)" ];
 
+  outputs = [
+    "out"
+    "man"
+  ];
+
   meta = {
     description = "Disk I/O latency measuring tool";
     maintainers = with lib.maintainers; [ raskin ];