diff --git a/Library/Homebrew/extend/ENV/std.rb b/Library/Homebrew/extend/ENV/std.rb
index b0c312c24a86c..22f5cb4056f96 100644
--- a/Library/Homebrew/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/ENV/std.rb
@@ -68,7 +68,6 @@ def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_a
     gcc_formula = gcc_version_formula(cc)
     append_path "PATH", gcc_formula.opt_bin.to_s
   end
-  alias generic_setup_build_environment setup_build_environment
 
   sig { returns(T.nilable(PATH)) }
   def determine_pkg_config_libdir
diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index 89f7ecfa5e654..812ae68bfddb6 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -119,7 +119,6 @@ def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_a
     # These flags will also be present:
     # a - apply fix for apr-1-config path
   end
-  alias generic_setup_build_environment setup_build_environment
 
   private
 
diff --git a/Library/Homebrew/extend/os/linux/extend/ENV/std.rb b/Library/Homebrew/extend/os/linux/extend/ENV/std.rb
index ba2fa12309d4a..8a249311b83f6 100644
--- a/Library/Homebrew/extend/os/linux/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/os/linux/extend/ENV/std.rb
@@ -1,36 +1,45 @@
 # typed: true # rubocop:todo Sorbet/StrictSigil
 # frozen_string_literal: true
 
-module Stdenv
-  sig {
-    params(
-      formula:         T.nilable(Formula),
-      cc:              T.nilable(String),
-      build_bottle:    T.nilable(T::Boolean),
-      bottle_arch:     T.nilable(String),
-      testing_formula: T::Boolean,
-      debug_symbols:   T.nilable(T::Boolean),
-    ).void
-  }
-  def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_arch: nil, testing_formula: false,
-                              debug_symbols: false)
-    generic_setup_build_environment(formula:, cc:, build_bottle:, bottle_arch:,
-                                    testing_formula:, debug_symbols:)
-
-    prepend_path "CPATH", HOMEBREW_PREFIX/"include"
-    prepend_path "LIBRARY_PATH", HOMEBREW_PREFIX/"lib"
-    prepend_path "LD_RUN_PATH", HOMEBREW_PREFIX/"lib"
-
-    return unless @formula
-
-    prepend_path "CPATH", @formula.include
-    prepend_path "LIBRARY_PATH", @formula.lib
-    prepend_path "LD_RUN_PATH", @formula.lib
-  end
+module OS
+  module Linux
+    module Stdenv
+      extend T::Helpers
+
+      requires_ancestor { ::Stdenv }
+
+      sig {
+        params(
+          formula:         T.nilable(Formula),
+          cc:              T.nilable(String),
+          build_bottle:    T.nilable(T::Boolean),
+          bottle_arch:     T.nilable(String),
+          testing_formula: T::Boolean,
+          debug_symbols:   T.nilable(T::Boolean),
+        ).void
+      }
+      def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_arch: nil,
+                                  testing_formula: false, debug_symbols: false)
+        super
+
+        prepend_path "CPATH", HOMEBREW_PREFIX/"include"
+        prepend_path "LIBRARY_PATH", HOMEBREW_PREFIX/"lib"
+        prepend_path "LD_RUN_PATH", HOMEBREW_PREFIX/"lib"
 
-  def libxml2
-    append "CPPFLAGS", "-I#{Formula["libxml2"].include/"libxml2"}"
-  rescue FormulaUnavailableError
-    nil
+        return unless @formula
+
+        prepend_path "CPATH", @formula.include
+        prepend_path "LIBRARY_PATH", @formula.lib
+        prepend_path "LD_RUN_PATH", @formula.lib
+      end
+
+      def libxml2
+        append "CPPFLAGS", "-I#{::Formula["libxml2"].include/"libxml2"}"
+      rescue FormulaUnavailableError
+        nil
+      end
+    end
   end
 end
+
+Stdenv.prepend(OS::Linux::Stdenv)
diff --git a/Library/Homebrew/extend/os/linux/extend/ENV/super.rb b/Library/Homebrew/extend/os/linux/extend/ENV/super.rb
index f0aa87920edad..6bc4da2d051bb 100644
--- a/Library/Homebrew/extend/os/linux/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/os/linux/extend/ENV/super.rb
@@ -1,73 +1,82 @@
 # typed: true # rubocop:todo Sorbet/StrictSigil
 # frozen_string_literal: true
 
-module Superenv
-  sig { returns(Pathname) }
-  def self.shims_path
-    HOMEBREW_SHIMS_PATH/"linux/super"
-  end
+module OS
+  module Linux
+    module Superenv
+      extend T::Helpers
 
-  sig { returns(T.nilable(Pathname)) }
-  def self.bin
-    shims_path.realpath
-  end
+      requires_ancestor { ::Superenv }
 
-  sig {
-    params(
-      formula:         T.nilable(Formula),
-      cc:              T.nilable(String),
-      build_bottle:    T.nilable(T::Boolean),
-      bottle_arch:     T.nilable(String),
-      testing_formula: T::Boolean,
-      debug_symbols:   T.nilable(T::Boolean),
-    ).void
-  }
-  def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_arch: nil, testing_formula: false,
-                              debug_symbols: false)
-    generic_setup_build_environment(formula:, cc:, build_bottle:, bottle_arch:,
-                                    testing_formula:, debug_symbols:)
-    self["HOMEBREW_OPTIMIZATION_LEVEL"] = "O2"
-    self["HOMEBREW_DYNAMIC_LINKER"] = determine_dynamic_linker_path
-    self["HOMEBREW_RPATH_PATHS"] = determine_rpath_paths(@formula)
-    self["M4"] = "#{HOMEBREW_PREFIX}/opt/m4/bin/m4" if deps.any? { |d| d.name == "libtool" || d.name == "bison" }
-  end
+      sig { returns(Pathname) }
+      def self.shims_path
+        HOMEBREW_SHIMS_PATH/"linux/super"
+      end
 
-  def homebrew_extra_paths
-    paths = generic_homebrew_extra_paths
-    paths += %w[binutils make].filter_map do |f|
-      bin = Formulary.factory(f).opt_bin
-      bin if bin.directory?
-    rescue FormulaUnavailableError
-      nil
-    end
-    paths
-  end
+      sig { returns(T.nilable(Pathname)) }
+      def self.bin
+        shims_path.realpath
+      end
 
-  def homebrew_extra_isystem_paths
-    paths = []
-    # Add paths for GCC headers when building against glibc@2.13 because we have to use -nostdinc.
-    if deps.any? { |d| d.name == "glibc@2.13" }
-      gcc_include_dir = Utils.safe_popen_read(cc, "--print-file-name=include").chomp
-      gcc_include_fixed_dir = Utils.safe_popen_read(cc, "--print-file-name=include-fixed").chomp
-      paths << gcc_include_dir << gcc_include_fixed_dir
-    end
-    paths
-  end
+      sig {
+        params(
+          formula:         T.nilable(Formula),
+          cc:              T.nilable(String),
+          build_bottle:    T.nilable(T::Boolean),
+          bottle_arch:     T.nilable(String),
+          testing_formula: T::Boolean,
+          debug_symbols:   T.nilable(T::Boolean),
+        ).void
+      }
+      def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_arch: nil,
+                                  testing_formula: false, debug_symbols: false)
+        super
+        self["HOMEBREW_OPTIMIZATION_LEVEL"] = "O2"
+        self["HOMEBREW_DYNAMIC_LINKER"] = determine_dynamic_linker_path
+        self["HOMEBREW_RPATH_PATHS"] = determine_rpath_paths(@formula)
+        self["M4"] = "#{HOMEBREW_PREFIX}/opt/m4/bin/m4" if deps.any? { |d| d.name == "libtool" || d.name == "bison" }
+      end
 
-  def determine_rpath_paths(formula)
-    PATH.new(
-      *formula&.lib,
-      "#{HOMEBREW_PREFIX}/opt/gcc/lib/gcc/current",
-      PATH.new(run_time_deps.map { |dep| dep.opt_lib.to_s }).existing,
-      "#{HOMEBREW_PREFIX}/lib",
-    )
-  end
+      def homebrew_extra_paths
+        paths = generic_homebrew_extra_paths
+        paths += %w[binutils make].filter_map do |f|
+          bin = Formulary.factory(f).opt_bin
+          bin if bin.directory?
+        rescue FormulaUnavailableError
+          nil
+        end
+        paths
+      end
+
+      def homebrew_extra_isystem_paths
+        paths = []
+        # Add paths for GCC headers when building against glibc@2.13 because we have to use -nostdinc.
+        if deps.any? { |d| d.name == "glibc@2.13" }
+          gcc_include_dir = Utils.safe_popen_read(cc, "--print-file-name=include").chomp
+          gcc_include_fixed_dir = Utils.safe_popen_read(cc, "--print-file-name=include-fixed").chomp
+          paths << gcc_include_dir << gcc_include_fixed_dir
+        end
+        paths
+      end
 
-  sig { returns(T.nilable(String)) }
-  def determine_dynamic_linker_path
-    path = "#{HOMEBREW_PREFIX}/lib/ld.so"
-    return unless File.readable? path
+      def determine_rpath_paths(formula)
+        PATH.new(
+          *formula&.lib,
+          "#{HOMEBREW_PREFIX}/opt/gcc/lib/gcc/current",
+          PATH.new(run_time_deps.map { |dep| dep.opt_lib.to_s }).existing,
+          "#{HOMEBREW_PREFIX}/lib",
+        )
+      end
 
-    path
+      sig { returns(T.nilable(String)) }
+      def determine_dynamic_linker_path
+        path = "#{HOMEBREW_PREFIX}/lib/ld.so"
+        return unless File.readable? path
+
+        path
+      end
+    end
   end
 end
+
+Superenv.prepend(OS::Linux::Superenv)
diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/std.rb b/Library/Homebrew/extend/os/mac/extend/ENV/std.rb
index 7aec76c23d50b..90f3dedacc725 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/std.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/std.rb
@@ -26,8 +26,7 @@ def homebrew_extra_pkg_config_paths
       }
       def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_arch: nil,
                                   testing_formula: false, debug_symbols: false)
-        generic_setup_build_environment(formula:, cc:, build_bottle:, bottle_arch:,
-                                        testing_formula:, debug_symbols:)
+        super
 
         append "LDFLAGS", "-Wl,-headerpad_max_install_names"
 
diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
index eb894c024b167..921e13707c6a5 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
@@ -108,8 +108,7 @@ def setup_build_environment(formula: nil, cc: nil, build_bottle: false, bottle_a
           self["M4"] = gm4
         end
 
-        generic_setup_build_environment(formula:, cc:, build_bottle:, bottle_arch:,
-                                        testing_formula:, debug_symbols:)
+        super
 
         # Filter out symbols known not to be defined since GNU Autotools can't
         # reliably figure this out with Xcode 8 and above.
diff --git a/Library/Homebrew/extend/os/mac/keg.rb b/Library/Homebrew/extend/os/mac/keg.rb
index 8f5ec2b5f9d1e..b71aaee900528 100644
--- a/Library/Homebrew/extend/os/mac/keg.rb
+++ b/Library/Homebrew/extend/os/mac/keg.rb
@@ -6,6 +6,7 @@
 class Keg
   include SystemCommand::Mixin
 
+  # TODO: re-implement these as functions, so that we aren't modifying constants:
   GENERIC_KEG_LINK_DIRECTORIES = (remove_const :KEG_LINK_DIRECTORIES).freeze
   KEG_LINK_DIRECTORIES = (GENERIC_KEG_LINK_DIRECTORIES + ["Frameworks"]).freeze
   GENERIC_MUST_EXIST_SUBDIRECTORIES = (remove_const :MUST_EXIST_SUBDIRECTORIES).freeze