Fix system-path with multiout

pkgs/build-support/buildenv/default.nix

@@ -21,10 +21,6 @@
   # directories in the list is not symlinked.
   pathsToLink ? ["/"]
 
-, # The package outputs to include. By default, only the default
-  # output is included.
-  outputsToLink ? []
-
 , # Root the result in directory "$out${extraPrefix}", e.g. "/share".
   extraPrefix ? ""
 
@@ -40,9 +36,7 @@
 runCommand name
   rec { inherit manifest ignoreCollisions passthru pathsToLink extraPrefix postBuild buildInputs;
     pkgs = builtins.toJSON (map (drv: {
-      paths =
-        [ drv ]
-        ++ lib.concatMap (outputName: lib.optional (drv.${outputName}.outPath or null != null) drv.${outputName}) outputsToLink;
+      paths = [ drv ];
       priority = drv.meta.priority or 5;
     }) paths);
     preferLocalBuild = true;