diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index bf2186a99faa..cfcc3c68c301 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -254,7 +254,7 @@ common =
 in rec {
   nix = nixStable;
 
-  nixStable = nix_2_6;
+  nixStable = nix_2_5;
 
   nix_2_3 = buildNix rec {
     version = "2.3.16";