For input,

const variable = false
;(function () {
  eval("var variable = true")
  console.log(variable)
})()

esbuild outputs

const variable=!1;(function(){eval("var variable = true"),console.log(!1)})();

when minified.
esbuild try

This changes the behavior of the code (true is output before minification, but false is output after minification). I guess it's because the fact that variable declarations inside direct eval leaks to the outside scope in non-strict mode is not taken into account when replacing constants.

(Note: this is not what I encountered in a real world usage. I found it when trying to know about the direct eval support in esbuild.)