diff --git a/pkgs/by-name/fl/flatten-references-graph/package.nix b/pkgs/by-name/fl/flatten-references-graph/package.nix
index 0a0ef73f1dda..a99093464653 100644
--- a/pkgs/by-name/fl/flatten-references-graph/package.nix
+++ b/pkgs/by-name/fl/flatten-references-graph/package.nix
@@ -1,4 +1,5 @@
 {
+  lib,
   callPackage,
   nix-gitignore,
   python3Packages,
@@ -34,4 +35,6 @@ pythonPackages.buildPythonApplication {
   passthru = {
     dev-shell = callPackage ./dev-shell.nix { };
   };
+
+  meta.license = lib.licenses.mit;
 }