diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fae08fcf5c7d..0c8eb0ae5dfb 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8942,7 +8942,7 @@ in
     ruby_2_5
     ruby_2_6;
 
-  ruby = ruby_2_5;
+  ruby = ruby_2_6;
 
   mruby = callPackage ../development/compilers/mruby { };