diff --git a/pkgs/by-name/li/libchewing/package.nix b/pkgs/by-name/li/libchewing/package.nix
index 7cfa864fc06f..e40cd9ddd52e 100644
--- a/pkgs/by-name/li/libchewing/package.nix
+++ b/pkgs/by-name/li/libchewing/package.nix
@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   pname = "libchewing";
-  version = "unstable-2020-06-27";
+  version = "0.5.1-unstable-2020-06-27";
 
   src = fetchFromGitHub {
     owner = "chewing";