diff --git a/pkgs/tools/package-management/koji/default.nix b/pkgs/tools/package-management/koji/default.nix
index 7f03ed1625e..28a1f3d00b7 100644
--- a/pkgs/tools/package-management/koji/default.nix
+++ b/pkgs/tools/package-management/koji/default.nix
@@ -17,5 +17,8 @@ stdenv.mkDerivation rec {
     rm -rf $out/nix
   '';
 
-  meta.maintainers = [ stdenv.lib.maintainers.mornfall ];
+  meta = {
+    maintainers = [ stdenv.lib.maintainers.mornfall ];
+    platforms = stdenv.lib.platforms.linux;
+  };
 }
diff --git a/pkgs/tools/text/sgml/opensp/compat.nix b/pkgs/tools/text/sgml/opensp/compat.nix
index 16498281181..2526273b812 100644
--- a/pkgs/tools/text/sgml/opensp/compat.nix
+++ b/pkgs/tools/text/sgml/opensp/compat.nix
@@ -14,6 +14,7 @@ stdenv.mkDerivation {
 
   setupHook = opensp.setupHook;
 
-  meta.description =
-    "Compatibility wrapper for old programs looking for original sp programs";
+  meta = opensp.meta // {
+    description = "Compatibility wrapper for old programs looking for original sp programs";
+  };
 }