diff --git a/pkgs/by-name/oo/ookla-speedtest/package.nix b/pkgs/by-name/oo/ookla-speedtest/package.nix
index 93685e244016..ca3019ec8232 100644
--- a/pkgs/by-name/oo/ookla-speedtest/package.nix
+++ b/pkgs/by-name/oo/ookla-speedtest/package.nix
@@ -48,9 +48,14 @@ stdenv.mkDerivation {
 
   installPhase = ''
     install -D speedtest $out/bin/speedtest
-    install -D speedtest.5 $out/share/man/man5/speedtest.5
+    install -D speedtest.5 $man/share/man/man5/speedtest.5
   '';
 
+  outputs = [
+    "out"
+    "man"
+  ];
+
   meta = {
     description = "Command line internet speedtest tool by Ookla";
     homepage = "https://www.speedtest.net/apps/cli";