Index: textproc/py-tomli/Makefile
===================================================================
--- textproc/py-tomli/Makefile
+++ textproc/py-tomli/Makefile
@@ -2,6 +2,7 @@
 
 PORTNAME=	tomli
 PORTVERSION=	2.0.1
+PORTREVISION=	1
 CATEGORIES=	textproc python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -12,12 +13,27 @@
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-USES=		python:3.7+
-USE_PYTHON=	autoplist concurrent distutils
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}flit-core>0:devel/py-flit-core@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}installer>0:devel/py-installer@${PY_FLAVOR}
+
+USES=		python
+USE_PYTHON=	allflavors concurrent flavors
 
 NO_ARCH=	yes
 
-post-patch:
-	@${SED} -e 's|%%PORTVERSION%%|${PORTVERSION}|' ${FILESDIR}/setup.py > ${WRKSRC}/setup.py
+do-build:
+	cd ${BUILD_WRKSRC} && ${PYTHON_CMD} -m flit_core.wheel
+
+do-install:
+	@(${MKDIR} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR})
+	${PYTHON_CMD} -m installer \
+		-d ${STAGEDIR} --no-compile-bytecode \
+		${BUILD_WRKSRC}/dist/${PORTNAME}-${PORTVERSION}-*.whl
+
+post-install:
+	# autoplist
+	${SED} -e 's|^|${PYTHONPREFIX_SITELIBDIR:S;^${PREFIX}/;;}/|' -e 's|\,.*$$||' \
+		${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/${PORTNAME}-${PORTVERSION}.dist-info/RECORD | \
+		${SORT} > ${TMPPLIST}
 
 .include <bsd.port.mk>
Index: textproc/py-tomli/files/setup.py
===================================================================
--- textproc/py-tomli/files/setup.py
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env python
-# setup.py generated by flit for tools that don't yet use PEP 517
-
-from distutils.core import setup
-
-packages = \
-['tomli']
-
-package_data = \
-{'': ['*']}
-
-package_dir = \
-{'': 'src'}
-
-setup(name='tomli',
-      version='%%PORTVERSION%%',
-      description="A lil' TOML parser",
-      author=None,
-      author_email='Taneli Hukkinen <hukkin@users.noreply.github.com>',
-      url=None,
-      packages=packages,
-      package_data=package_data,
-      package_dir=package_dir,
-      python_requires='>=3.7',
-     )