diff --git a/make/project.conf b/make/project.conf
index 71fa0347..13d178fa 100644
--- a/make/project.conf
+++ b/make/project.conf
@@ -21,7 +21,7 @@ devel = jw-pkg-run = VERSION-REVISION
 run = bash, python3
 build = make, time, xdg-utils, coreutils, cpio, xdg-utils, git-core
 devel = sudo, gawk, pkg-config
-release = python3-isort, python3-yapf, python3-ruff, python3-pyright
+release = mypy, python3-isort, python3-yapf, python3-pyright
 
 [pkg.requires.centos]
 run = hostname, python
@@ -36,11 +36,11 @@ build = realpath
 
 [pkg.requires.suse]
 run = python3
-release = rpmbuild, python3-base
+release = rpmbuild, python3-base, python3-yapf
 
 [pkg.requires.debian]
 run = python3
-release = devscripts, debhelper, dput, libparse-debcontrol-perl, fakeroot, build-essential:native
+release = devscripts, debhelper, dput, libparse-debcontrol-perl, fakeroot, build-essential:native, yapf3
 
 [pkg.requires.yocto]
 run = python3-core
diff --git a/make/py-topdir.mk b/make/py-topdir.mk
index 951762f1..377bad28 100644
--- a/make/py-topdir.mk
+++ b/make/py-topdir.mk
@@ -4,6 +4,14 @@ TD_GENERATE_FILES           += pyrightconfig.json
 PY_CHECK_EXCLUDE            ?=
 PY_SRC_ROOT                 += $(wildcard $(TOPDIR)/src $(TOPDIR)/tools)
 
+ifndef PY_CHECK_RUFF
+  PY_CHECK_RUFF             := $(shell which ruff 2>/dev/null)
+endif
+
+ifndef PY_CHECK_YAPF
+  PY_CHECK_YAPF             := $(firstword $(wildcard /usr/bin/yapf /usr/bin/yapf3))
+endif
+
 all:
 
 format: py-format
@@ -12,17 +20,23 @@ check-format: py-check-format
 
 py-check: py-check-syntax py-check-format
 py-check-syntax:
-	ruff check $(addprefix --exclude ,$(PY_CHECK_EXCLUDE)) $(PY_SRC_ROOT)
+ifneq ($(PY_CHECK_RUFF),)
+	$(PY_CHECK_RUFF) check $(addprefix --exclude ,$(PY_CHECK_EXCLUDE)) $(PY_SRC_ROOT)
+endif
 	mypy $(addprefix --exclude ,$(PY_CHECK_EXCLUDE)) $(PY_SRC_ROOT)
 	pyright
 
 py-check-format:
-	yapf --diff --recursive .
+ifneq ($(PY_CHECK_YAPF),)
+	$(PY_CHECK_YAPF) --diff --recursive .
+endif
 
 py-format:
 	find . -type f -name '*.py' -print0 | \
 		xargs -0 sed -i -E '1{/^# -\*- coding: utf-8 -\*-$$/{:a;N;/\n[[:space:]]*$$/ba;s/^# -\*- coding: utf-8 -\*-\n([[:space:]]*\n)*/ /;s/^ //}}'
-	yapf --in-place --recursive .
+ifneq ($(PY_CHECK_YAPF),)
+	$(PY_CHECK_YAPF) --in-place --recursive .
+endif
 
 py-format-assignments:
 	find . \