Add meta with license to nix-portable

pkgs/nix-portable/default.nix

@@ -607,7 +607,17 @@ let
 
   runtimeScriptEscaped = replaceStrings ["\""] ["\\\""] runtimeScript;
 
-  nixPortable = pkgs.runCommand pname {nativeBuildInputs = [unixtools.xxd unzip];} ''
+  nixPortable = pkgs.runCommand pname {
+    nativeBuildInputs = [unixtools.xxd unzip];
+
+    meta = {
+      homepage = "https://github.com/DavHau/nix-portable";
+      description = "Nix - Static, Permissionless, Installation-free, Pre-configured for mn5";
+      maintainers = with lib.maintainers.bsc; [ abonerib ];
+      platforms = lib.platforms.linux;
+      license = lib.licenses.mit;
+    };
+  } ''
     mkdir -p $out/bin
     echo "${runtimeScriptEscaped}" > $out/bin/nix-portable.zip
     xxd $out/bin/nix-portable.zip | tail