diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 52909fa..6578067 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -14,7 +14,7 @@ stages:
   before_script:
     - printf "[multilib]\nInclude = /etc/pacman.d/mirrorlist\n" >> /etc/pacman.conf
     - pacman --noconfirm -Fyy
-    - pacman --noconfirm -Syyu --needed base-devel git python-tox
+    - pacman --noconfirm -Syyu --needed base-devel git python-poetry python-tox
 
 linter:
   extends: .test
diff --git a/pyproject.toml b/pyproject.toml
index 9185c8d..0f0b83f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -113,5 +113,7 @@ disallow_incomplete_defs = true
 show_error_codes = true
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
+# requiring setuptools to get around flaky pip behavior (we actually don't need it)
+# https://github.com/pypa/pip/issues/6100
+requires = ["setuptools", "poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
diff --git a/tox.ini b/tox.ini
index 7f4170a..3f77604 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,35 +1,37 @@
 [tox]
-isolated_build = true
+isolated_build = True
 envlist = linter,coverage
 skip_missing_interpreters = True
-requires =
-    tox-poetry-dev-dependencies
 
 [testenv]
 base_python = py310
-poetry_add_dev_dependencies = True
+whitelist_externals = poetry
 
 [testenv:coverage]
 commands =
-    coverage run
-    coverage xml -o {toxworkdir}/coverage.xml -i
-    coverage html -d {toxworkdir}/htmlcov -i
-    coverage report --fail-under=100.0
+    poetry install -E vercmp
+    poetry run coverage run
+    poetry run coverage xml -o {toxworkdir}/coverage.xml -i
+    poetry run coverage html -d {toxworkdir}/htmlcov -i
+    poetry run coverage report --fail-under=100.0
 
 [testenv:linter]
 commands =
-    isort --check .
-    black --check .
-    flake8
-    mypy --install-types --non-interactive -p repod -p tests
+    poetry install
+    poetry run isort --check .
+    poetry run black --check .
+    poetry run flake8
+    poetry run mypy --install-types --non-interactive -p repod -p tests
 
 [testenv:docs]
 commands =
-    python -c 'from repod.models.package import export_schemas; export_schemas(output="docs/repositories/schema/")'
-    python -c 'from repod.files.buildinfo import export_schemas; export_schemas(output="docs/packages/schema/")'
-    python -c 'from repod.files.mtree import export_schemas; export_schemas(output="docs/packages/schema/")'
-    sphinx-build -M html docs/ docs/_build/
+    poetry install
+    poetry run python -c 'from repod.models.package import export_schemas; export_schemas(output="docs/repositories/schema/")'
+    poetry run python -c 'from repod.files.buildinfo import export_schemas; export_schemas(output="docs/packages/schema/")'
+    poetry run python -c 'from repod.files.mtree import export_schemas; export_schemas(output="docs/packages/schema/")'
+    poetry run sphinx-build -M html docs/ docs/_build/
 
 [testenv:integration]
 commands =
-    pytest -vv tests/ -m "integration"
+    poetry install
+    poetry run pytest -m "integration"