diff --git a/pkgs/development/libraries/vapoursynth/default.nix b/pkgs/development/libraries/vapoursynth/default.nix
index 6abc58494da6..0d990b983635 100644
--- a/pkgs/development/libraries/vapoursynth/default.nix
+++ b/pkgs/development/libraries/vapoursynth/default.nix
@@ -6,12 +6,12 @@
 
 stdenv.mkDerivation rec {
   pname = "vapoursynth";
-  version = "R58";
+  version = "58";
 
   src = fetchFromGitHub {
     owner  = "vapoursynth";
     repo   = "vapoursynth";
-    rev    = version;
+    rev    = "R${version}";
     sha256 = "sha256-LIjNfyfpyvE+Ec6f4aGzRA4ZGoWPFhjtUw4yrenDsUQ=";
   };