diff --git a/MODULE.bazel b/MODULE.bazel
index 3931167..4e1c7a3 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -7,7 +7,7 @@ module(
 )
 
 bazel_dep(name = "bazel_features", version = "1.10.0")
-bazel_dep(name = "bazel_skylib", version = "1.6.1")
+bazel_dep(name = "bazel_skylib", version = "1.3.0")
 bazel_dep(name = "platforms", version = "0.0.9")
 bazel_dep(name = "rules_cc", version = "0.0.8")
 
diff --git a/crosstool/setup.bzl b/crosstool/setup.bzl
index 2867cb4..eaf8913 100644
--- a/crosstool/setup.bzl
+++ b/crosstool/setup.bzl
@@ -1,6 +1,5 @@
 """Configure the Apple CC toolchain"""
 
-load("@bazel_skylib//lib:modules.bzl", "modules")
 load("//crosstool:osx_cc_configure.bzl", "configure_osx_toolchain")
 
 _DISABLE_ENV_VAR = "BAZEL_NO_APPLE_CPP_TOOLCHAIN"
@@ -80,8 +79,8 @@ def apple_cc_configure():
         "@local_config_apple_cc_toolchains//:all",
     )
 
-def _apple_cc_configure_extension_impl():
+def _apple_cc_configure_extension_impl(_):
     _apple_cc_autoconf_toolchains(name = "local_config_apple_cc_toolchains")
     _apple_cc_autoconf(name = "local_config_apple_cc")
 
-apple_cc_configure_extension = modules.as_extension(_apple_cc_configure_extension_impl)
+apple_cc_configure_extension = module_extension(implementation = _apple_cc_configure_extension_impl)
diff --git a/lib/repositories.bzl b/lib/repositories.bzl
index 8776627..ede5b48 100644
--- a/lib/repositories.bzl
+++ b/lib/repositories.bzl
@@ -40,10 +40,10 @@ def apple_support_dependencies():
         http_archive,
         name = "bazel_skylib",
         urls = [
-            "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.6.1/bazel-skylib-1.6.1.tar.gz",
-            "https://github.com/bazelbuild/bazel-skylib/releases/download/1.6.1/bazel-skylib-1.6.1.tar.gz",
+            "https://github.com/bazelbuild/bazel-skylib/releases/download/1.3.0/bazel-skylib-1.3.0.tar.gz",
+            "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.3.0/bazel-skylib-1.3.0.tar.gz",
         ],
-        sha256 = "9f38886a40548c6e96c106b752f242130ee11aaa068a56ba7e56f4511f33e4f2",
+        sha256 = "74d544d96f4a5bb630d465ca8bbcfe231e3594e5aae57e1edbf17a6eb3ca2506",
     )
 
     _maybe(