src/coreboot: expose src attr in passthru.src

src/coreboot/default.nix

@@ -11,11 +11,6 @@
 let
   version = "4.9";
   inherit (nixpkgsOnBuildForBuild) stdenv lib git python2 ncurses fetchgit;
-in
-stdenv.mkDerivation {
-  pname = "coreboot";
-  inherit version;
-
   src = fetchgit {
     url = "https://review.coreboot.org/coreboot";
     branchName = "${version}";
@@ -23,6 +18,13 @@ stdenv.mkDerivation {
     hash = "sha256-lX6QnUS4a/F4Y68qK9i45O4OP+UEjHlCK+YaKJOQLUo=";
     fetchSubmodules = false;
   };
+in
+stdenv.mkDerivation {
+  pname = "coreboot";
+  inherit version;
+
+  passthru = { inherit src; };
+  inherit src;
 
   prePatch = ''
     patchShebangs .