some versions

packages/librepods/default.nix

@@ -9,7 +9,10 @@
   libpulseaudio,
   fetchFromGitHub,
 }:
-
+let
+  inherit (lib.trivial) importJSON;
+  versions = importJSON ./versions.json;
+in
 stdenv.mkDerivation {
   pname = "librepods";
   version = "unstable";
@@ -17,8 +20,8 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "kavishdevar";
     repo = "librepods";
-    rev = "287163e116d092485d561ad571dae03a2f43cf2f";
-    hash = "sha256-PD5U87RVBRCLWwnN54x3AEey6wqoOeZlBvzyIESH1v8=";
+    rev = versions.rev;
+    hash = versions.hash;
   };
 
   sourceRoot = "source/linux";