diff --git a/pkgs/by-name/se/seabios/package.nix b/pkgs/by-name/se/seabios/package.nix
index 0e0fc06aeb16..ac647e93b195 100644
--- a/pkgs/by-name/se/seabios/package.nix
+++ b/pkgs/by-name/se/seabios/package.nix
@@ -89,6 +89,11 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstall
   '';
 
+  passthru = {
+    build-type = ___build-type;
+    firmware = "${finalAttrs.finalPackage}/share/seabios/${biosfile}";
+  };
+
   meta = {
     homepage = "https://www.seabios.org";
     description = "Open source implementation of a 16bit x86 BIOS";