diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 5789ed9..b28bdde 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -200,7 +200,6 @@ def _zig_repository_impl(repository_ctx):
 
 zig_repository = repository_rule(
     attrs = {
-        "url": attr.string(),
         "version": attr.string(),
         "host_platform_sha256": attr.string_dict(),
         "url_format": attr.string(),