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-rw-r--r--pkgs/games/trackballs/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/games/trackballs/default.nix b/pkgs/games/trackballs/default.nix
index 06bd2a8bc4d..8549a860d8e 100644
--- a/pkgs/games/trackballs/default.nix
+++ b/pkgs/games/trackballs/default.nix
@@ -19,5 +19,6 @@ stdenv.mkDerivation rec {
     homepage = https://trackballs.github.io/;
     description = "3D Marble Madness clone";
     platforms = stdenv.lib.platforms.linux;
+    license = stdenv.lib.licenses.gpl2;
   };
 }