diff --git a/trunk/PKGBUILD b/trunk/PKGBUILD
index e053af8..302979f 100644
--- a/trunk/PKGBUILD
+++ b/trunk/PKGBUILD
@@ -9,38 +9,28 @@ pkgdesc='Simplified packaging of Python modules'
 arch=('any')
 url='https://github.com/takluyver/flit'
 license=('BSD')
+options=('!emptydirs')
 depends=('python')
-makedepends=('python-setuptools' 'python-dephell'
+makedepends=('python-setuptools' 'python-build' 'python-pip'
              'python-requests' 'python-docutils' 'python-pytoml')
              #'python-build' 'python-install' 'python-pyproject2setuppy'
 checkdepends=('python-pytest-runner' 'python-pytest-cov' 'python-testpath' 'python-responses')
 source=("$pkgbase-$pkgver.tar.gz::$url/archive/$pkgver.tar.gz")
 sha512sums=('b40768fb4b0b2a2e3116ac790dfa629da5a57cda34b10abb8ce6a8febcc3436795d5122dcfa3db2c6d07d493f00391d2ca7300112561c8ff2a0b04d77c879662')
 
-prepare() {
-  cd $_pkgname-$pkgver
-
-  dephell deps convert --from pyproject.toml --to setup.py
-
-  cd flit_core
-
-  dephell deps convert --from pyproject.toml --to setup.py
-}
-
 build() {
-  cd $_pkgname-$pkgver
+  pyproject-build --skip-dependencies $_pkgname-$pkgver
 
-  python setup.py build
+  cd $_pkgname-$pkgver
 
-  cd flit_core
+  pyproject-build --skip-dependencies flit_core
 
-  python setup.py build
 }
 
 check() {
   cd $_pkgname-$pkgver
 
-  python setup.py pytest
+  PYTHONPATH=flit_core python -m pytest --cov=flit --cov=flit_core/flit_core
 }
 
 package_python-flit() {
@@ -49,8 +39,16 @@ package_python-flit() {
   conflicts=($_pkgname)
 
   cd $_pkgname-$pkgver
+  PIP_CONFIG_FILE=/dev/null pip install --isolated --root="${pkgdir}" --ignore-installed --no-deps dist/*.whl
+  rm "${pkgdir}"/usr/lib/python3.9/site-packages/flit-3.2.0.dist-info/direct_url.json
+  sed -i '/direct_url.json/d' "${pkgdir}"/usr/lib/python3.9/site-packages/flit-3.2.0.dist-info/RECORD
+  find "$pkgdir" -name '*\.cpython-39.pyc' -delete
+  # generate bytecode and strip $pkgdir from embedded paths:
+  python -m compileall -d "/usr/lib/python3.9/site-packages/flit/" \
+    "$pkgdir"/usr/lib/python3.9/site-packages/flit/
+  python -O -m compileall -d "/usr/lib/python3.9/site-packages/flit/" \
+    "$pkgdir"/usr/lib/python3.9/site-packages/flit/
 
-  python setup.py install --root="$pkgdir" --optimize=1 --skip-build
   cp -a flit/license_templates "$pkgdir"/usr/lib/python3.9/site-packages/flit/
 
   install -Dm 644 LICENSE "$pkgdir"/usr/share/licenses/$pkgname/LICENSE
@@ -60,8 +58,15 @@ package_python-flit-core() {
   pkgdesc+=' (core backend)'
 
   cd $_pkgname-$pkgver/flit_core
-
-  python setup.py install --root="$pkgdir" --optimize=1 --skip-build
+  PIP_CONFIG_FILE=/dev/null pip install --isolated --root="${pkgdir}" --ignore-installed --no-deps dist/*.whl
+  rm "${pkgdir}"/usr/lib/python3.9/site-packages/flit_core-3.2.0.dist-info/direct_url.json
+  sed -i '/direct_url.json/d' "${pkgdir}"/usr/lib/python3.9/site-packages/flit_core-3.2.0.dist-info/RECORD
+  find "$pkgdir" -name '*\.cpython-39.pyc' -delete
+  # generate bytecode and strip $pkgdir from embedded paths:
+  python -m compileall -d "/usr/lib/python3.9/site-packages/flit-core/" \
+    "$pkgdir"/usr/lib/python3.9/site-packages/flit-core/
+  python -O -m compileall -d "/usr/lib/python3.9/site-packages/flit-core/" \
+    "$pkgdir"/usr/lib/python3.9/site-packages/flit-core/
 
   install -Dm 644 ../LICENSE "$pkgdir"/usr/share/licenses/$pkgname/LICENSE
 }