diff --git a/plugins/python-build/README.md b/plugins/python-build/README.md
index f6f4de5b..d0626482 100644
--- a/plugins/python-build/README.md
+++ b/plugins/python-build/README.md
@@ -186,7 +186,7 @@ You can set certain environment variables to control the build process.
 * `PYTHON_BUILD_USE_HOMEBREW`, if set, will search for libraries installed by Homebrew when it normally wouldn't.
 * `PYTHON_BUILD_HOMEBREW_OPENSSL_FORMULA`, override the Homebrew OpenSSL formula to use.
 * `PYTHON_BUILD_MACPORTS_OPENSSL_FORMULA`, override the MacPorts OpenSSL formula to use. The default is `openssl3 openssl`.
-* `PYTHON_BUILD_TCLTK_FORMULA`, override the Homebrew Tcl/Tk formula to use.
+* `PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA`, override the Homebrew Tcl/Tk formula to use.
 * `PYTHON_BUILD_SKIP_MACPORTS`, if set, will not search for libraries installed by MacPorts when it normally would.
 * `PYTHON_BUILD_USE_MACPORTS`, if set, will search for libraries installed by MacPorts when it normally wouldn't.
 * `PYTHON_BUILD_ROOT` overrides the default location from where build definitions
diff --git a/plugins/python-build/bin/python-build b/plugins/python-build/bin/python-build
index 12ea3f06..fd1240db 100755
--- a/plugins/python-build/bin/python-build
+++ b/plugins/python-build/bin/python-build
@@ -2006,9 +2006,14 @@ use_homebrew_tcltk() {
   can_use_homebrew || return 1
   local tcltk_formula
   # Since https://github.com/Homebrew/homebrew-core/commit/f10e88617b41555193c22fdcba6109fe82155ee2 (10.11.2024),
-  # tcl-tk is 9.0. It's supported in CPython since 3.14.0a1 (gh-124111) but is not officially supported as of 3.14.0
-  # so we prefer 8
-  for tcltk_formula in ${PYTHON_BUILD_TCLTK_FORMULA:-tcl-tk@8 tcl-tk}; do
+  # tcl-tk is 9.0. It's supported in CPython since 3.14.0a1 (gh-124111) but is not officially supported as of 3.14.0,
+  # as of 3.15.0rc3, there are still test failures.
+  # So we prefer 8.
+  if [[ -n $PYTHON_BUILD_TCLTK_FORMULA ]]; then
+    export PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA="${PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA:-$PYTHON_BUILD_TCLTK_FORMULA}"
+    echo "warning: the PYTHON_BUILD_TCLTK_FORMULA envvar has been renamed to PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA" >&2
+  fi
+  for tcltk_formula in ${PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA:-tcl-tk@8 tcl-tk}; do
     local tcltk_prefix="$(brew --prefix "${tcltk_formula}" 2>/dev/null || true)"
     if [ -d "$tcltk_prefix" ]; then
       echo "python-build: use ${tcltk_formula} from homebrew"
diff --git a/plugins/python-build/test/build.bats b/plugins/python-build/test/build.bats
index 9003f78f..959a27dc 100644
--- a/plugins/python-build/test/build.bats
+++ b/plugins/python-build/test/build.bats
@@ -1066,8 +1066,10 @@ make install
 OUT
 }
 
-@test "tcl-tk is linked from Homebrew with PYTHON_BUILD_TCLTK_FORMULA" {
+test_tcltk_var() {
+  local var="${1:?}"
   cached_tarball "Python-3.6.2"
+  
   stub_tcltk "${tcl_tk_libdir:=$BATS_TEST_TMPDIR/homebrew-tcl-tk}"
 
   stub uname '-s : echo Darwin'
@@ -1080,7 +1082,7 @@ OUT
   stub_make_install
 
   run_inline_definition <<DEF
-PYTHON_BUILD_TCLTK_FORMULA=tcl-tk-custom
+$var=tcl-tk-custom
 install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.tar.gz"
 DEF
   assert_success
@@ -1098,6 +1100,34 @@ make install
 OUT
 }
 
+@test "tcl-tk is linked from Homebrew with PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA" {
+  test_tcltk_var PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA
+}
+
+@test "tcl-tk is linked from Homebrew with PYTHON_BUILD_TCLTK_FORMULA" {
+  test_tcltk_var PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA
+}
+
+@test "PYTHON_BUILD_TCLTK_FORMULA produces a deprecation warning" {
+  cached_tarball "Python-3.6.2"
+
+  stub uname '-s : echo Darwin'
+  stub sw_vers '-productVersion : echo 1010'
+
+  stub brew '--prefix openssl : false'
+  stub brew "--prefix tcl-tk-custom : echo '$tcl_tk_libdir'"
+  for i in {1..4}; do stub brew false; done
+
+  stub_make_install
+
+  run_inline_definition <<DEF
+PYTHON_BUILD_TCLTK_FORMULA=tcl-tk-whatever
+install_package "Python-3.6.2" "http://python.org/ftp/python/3.6.2/Python-3.6.2.tar.gz"
+DEF
+  assert_success
+  assert_line "warning: the PYTHON_BUILD_TCLTK_FORMULA envvar has been renamed to PYTHON_BUILD_HOMEBREW_TCLTK_FORMULA"
+}
+
 @test "tcl-tk is linked from Homebrew via pkg-config and override vars" {
   cached_tarball "Python-3.6.2" - TCLTK_CFLAGS TCLTK_LIBS
   stub_tcltk "${tcl_tk_libdir:=$BATS_TEST_TMPDIR/homebrew-tcl-tk}"