diff --git a/pkgs/by-name/bu/butterfly/package.nix b/pkgs/by-name/bu/butterfly/package.nix
index dd45371ca31d..bf7a399b14c1 100644
--- a/pkgs/by-name/bu/butterfly/package.nix
+++ b/pkgs/by-name/bu/butterfly/package.nix
@@ -70,8 +70,13 @@ flutter.buildFlutterApplication {
     license = with lib.licenses; [
       agpl3Plus
       cc-by-sa-40
+      asl20 # pdfium-binaries
     ];
     maintainers = with lib.maintainers; [ aucub ];
     platforms = [ "x86_64-linux" ];
+    sourceProvenance = with lib.sourceTypes; [
+      fromSource
+      binaryNativeCode # pdfium-binaries
+    ];
   };
 }