diff --git a/pkgs/by-name/ni/nix-zsh-completions/package.nix b/pkgs/by-name/ni/nix-zsh-completions/package.nix
index 4d06a425fcea..ee5481ad9078 100644
--- a/pkgs/by-name/ni/nix-zsh-completions/package.nix
+++ b/pkgs/by-name/ni/nix-zsh-completions/package.nix
@@ -6,13 +6,13 @@
 
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "nix-zsh-completions";
-  version = "0.5.1";
+  version = "0.5.1-unstable-2025-12-12";
 
   src = fetchFromGitHub {
     owner = "nix-community";
     repo = "nix-zsh-completions";
-    tag = finalAttrs.version;
-    hash = "sha256-bgbMc4HqigqgdkvUe/CWbUclwxpl17ESLzCIP8Sz+F8=";
+    rev = "d4ae06bedb9a353ac894862d1d83f60ab4e2ccce";
+    hash = "sha256-ogDhANf4MpVZn5sWZymT0EIjDMTLSHRGzNjHsw/dX8o=";
   };
 
   strictDeps = true;