diff --git a/pkgs/development/interpreters/ruby/bundler-env/default-gem-config.nix b/pkgs/development/interpreters/ruby/bundler-env/default-gem-config.nix
index b7ddfdea80b..38b7ce530ae 100644
--- a/pkgs/development/interpreters/ruby/bundler-env/default-gem-config.nix
+++ b/pkgs/development/interpreters/ruby/bundler-env/default-gem-config.nix
@@ -25,7 +25,6 @@
 
 let
   v8 = v8_3_16_14;
-  mysql = assert false; (import <nixpkgs> {}).mysql;
 
 in