diff --git a/pkgs/by-name/co/coolreader/package.nix b/pkgs/by-name/co/coolreader/package.nix
index fdf9bce196c8..8b15cb75533c 100644
--- a/pkgs/by-name/co/coolreader/package.nix
+++ b/pkgs/by-name/co/coolreader/package.nix
@@ -17,8 +17,8 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchFromGitHub {
     owner = "buggins";
     repo = "coolreader";
-    rev = "cr${finalAttrs.version}";
-    sha256 = "sha256-RgVEOaNBaEuPBC75B8PdCkbqMvEzNmnEYmiI1ny/WFQ=";
+    tag = "cr${finalAttrs.version}";
+    hash = "sha256-RgVEOaNBaEuPBC75B8PdCkbqMvEzNmnEYmiI1ny/WFQ=";
   };
 
   patches = [ ./cmake_policy_version_3_5.patch ];