seabios: make reproducible

pkgs/by-name/se/seabios/package.nix

@@ -1,7 +1,7 @@
 {
   lib,
   acpica-tools,
-  fetchgit,
+  fetchzip,
   python3,
   stdenv,
   writeText,
@@ -36,10 +36,12 @@ stdenv.mkDerivation (finalAttrs: {
   pname = "seabios";
   version = "1.16.3";
 
-  src = fetchgit {
-    url = "https://git.seabios.org/seabios.git";
-    rev = "rel-${finalAttrs.version}";
-    hash = "sha256-hWemj83cxdY8p+Jhkh5GcPvI0Sy5aKYZJCsKDjHTUUk=";
+  # This was changed to fetchgit in the past as a release tarball wasn't
+  # available. This caused the build to be non-reproducible due to a missing
+  # .version file (buildversion.py uses the current date/time instead).
+  src = fetchzip {
+    url = "https://seabios.org/downloads/seabios-${finalAttrs.version}.tar.gz";
+    hash = "sha256-Kf79juWspKumJI9r4BOe2kL/C3DmI7PoKASZBhYNyfo=";
   };
 
   outputs = [