diff --git a/examples/decorator/.template/pyproject.toml b/examples/decorator/.template/pyproject.toml
index 537fdacc..d27a1be9 100644
--- a/examples/decorator/.template/pyproject.toml
+++ b/examples/decorator/.template/pyproject.toml
@@ -5,3 +5,6 @@ build-backend = "maturin"
 [project]
 name = "{{project-name}}"
 version = "0.1.0"
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/decorator/noxfile.py b/examples/decorator/noxfile.py
index 17a6b80f..23d967cc 100644
--- a/examples/decorator/noxfile.py
+++ b/examples/decorator/noxfile.py
@@ -2,8 +2,7 @@ import nox
 
 
 @nox.session
-def python(session):
-    session.install("-rrequirements-dev.txt")
-    session.install("maturin")
-    session.run_always("maturin", "develop")
+def python(session: nox.Session):
+    session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
+    session.install(".[dev]")
     session.run("pytest")
diff --git a/examples/decorator/pyproject.toml b/examples/decorator/pyproject.toml
index 8575ca25..88280a6b 100644
--- a/examples/decorator/pyproject.toml
+++ b/examples/decorator/pyproject.toml
@@ -14,3 +14,6 @@ classifiers = [
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",
 ]
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/decorator/requirements-dev.txt b/examples/decorator/requirements-dev.txt
deleted file mode 100644
index 9ea7f14b..00000000
--- a/examples/decorator/requirements-dev.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-pytest>=3.5.0
-pip>=21.3
-maturin>=0.12,<0.13
diff --git a/examples/getitem/.template/pyproject.toml b/examples/getitem/.template/pyproject.toml
index 537fdacc..d27a1be9 100644
--- a/examples/getitem/.template/pyproject.toml
+++ b/examples/getitem/.template/pyproject.toml
@@ -5,3 +5,6 @@ build-backend = "maturin"
 [project]
 name = "{{project-name}}"
 version = "0.1.0"
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/getitem/noxfile.py b/examples/getitem/noxfile.py
index 17a6b80f..23d967cc 100644
--- a/examples/getitem/noxfile.py
+++ b/examples/getitem/noxfile.py
@@ -2,8 +2,7 @@ import nox
 
 
 @nox.session
-def python(session):
-    session.install("-rrequirements-dev.txt")
-    session.install("maturin")
-    session.run_always("maturin", "develop")
+def python(session: nox.Session):
+    session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
+    session.install(".[dev]")
     session.run("pytest")
diff --git a/examples/getitem/pyproject.toml b/examples/getitem/pyproject.toml
index 2cb6dc71..6e05570e 100644
--- a/examples/getitem/pyproject.toml
+++ b/examples/getitem/pyproject.toml
@@ -14,3 +14,6 @@ classifiers = [
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",
 ]
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/getitem/requirements-dev.txt b/examples/getitem/requirements-dev.txt
deleted file mode 100644
index d9913970..00000000
--- a/examples/getitem/requirements-dev.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-pytest>=3.5.0
-pip>=21.3
-maturin>=1,<2
diff --git a/examples/maturin-starter/.template/pyproject.toml b/examples/maturin-starter/.template/pyproject.toml
index 537fdacc..d27a1be9 100644
--- a/examples/maturin-starter/.template/pyproject.toml
+++ b/examples/maturin-starter/.template/pyproject.toml
@@ -5,3 +5,6 @@ build-backend = "maturin"
 [project]
 name = "{{project-name}}"
 version = "0.1.0"
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/maturin-starter/noxfile.py b/examples/maturin-starter/noxfile.py
index 17a6b80f..12ed90e5 100644
--- a/examples/maturin-starter/noxfile.py
+++ b/examples/maturin-starter/noxfile.py
@@ -3,7 +3,6 @@ import nox
 
 @nox.session
 def python(session):
-    session.install("-rrequirements-dev.txt")
-    session.install("maturin")
-    session.run_always("maturin", "develop")
+    session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
+    session.install(".[dev]")
     session.run("pytest")
diff --git a/examples/maturin-starter/pyproject.toml b/examples/maturin-starter/pyproject.toml
index fb9c808f..52ecba15 100644
--- a/examples/maturin-starter/pyproject.toml
+++ b/examples/maturin-starter/pyproject.toml
@@ -14,3 +14,6 @@ classifiers = [
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",
 ]
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/maturin-starter/requirements-dev.txt b/examples/maturin-starter/requirements-dev.txt
deleted file mode 100644
index 9ea7f14b..00000000
--- a/examples/maturin-starter/requirements-dev.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-pytest>=3.5.0
-pip>=21.3
-maturin>=0.12,<0.13
diff --git a/examples/plugin/plugin_api/noxfile.py b/examples/plugin/plugin_api/noxfile.py
index 3b53c0c3..12ed90e5 100644
--- a/examples/plugin/plugin_api/noxfile.py
+++ b/examples/plugin/plugin_api/noxfile.py
@@ -3,7 +3,6 @@ import nox
 
 @nox.session
 def python(session):
-    session.install("-rrequirements-dev.txt")
-    session.install("maturin")
-    session.run_always("maturin", "develop", "--features", "extension-module")
+    session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
+    session.install(".[dev]")
     session.run("pytest")
diff --git a/examples/plugin/plugin_api/pyproject.toml b/examples/plugin/plugin_api/pyproject.toml
index 5a460385..82f331d9 100644
--- a/examples/plugin/plugin_api/pyproject.toml
+++ b/examples/plugin/plugin_api/pyproject.toml
@@ -10,3 +10,6 @@ classifiers = [
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/plugin/plugin_api/requirements-dev.txt b/examples/plugin/plugin_api/requirements-dev.txt
deleted file mode 100644
index 20c7cdfb..00000000
--- a/examples/plugin/plugin_api/requirements-dev.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-pytest>=3.5.0
-pip>=21.3
-maturin>=0.14
diff --git a/examples/setuptools-rust-starter/noxfile.py b/examples/setuptools-rust-starter/noxfile.py
index f6c62af1..9edab962 100644
--- a/examples/setuptools-rust-starter/noxfile.py
+++ b/examples/setuptools-rust-starter/noxfile.py
@@ -2,7 +2,7 @@ import nox
 
 
 @nox.session
-def python(session):
+def python(session: nox.Session):
     session.install("-rrequirements-dev.txt")
     session.run_always(
         "pip", "install", "-e", ".", "--no-build-isolation", env={"BUILD_DEBUG": "1"}
diff --git a/examples/string-sum/.template/pyproject.toml b/examples/string-sum/.template/pyproject.toml
index 537fdacc..d27a1be9 100644
--- a/examples/string-sum/.template/pyproject.toml
+++ b/examples/string-sum/.template/pyproject.toml
@@ -5,3 +5,6 @@ build-backend = "maturin"
 [project]
 name = "{{project-name}}"
 version = "0.1.0"
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/string-sum/noxfile.py b/examples/string-sum/noxfile.py
index 17a6b80f..23d967cc 100644
--- a/examples/string-sum/noxfile.py
+++ b/examples/string-sum/noxfile.py
@@ -2,8 +2,7 @@ import nox
 
 
 @nox.session
-def python(session):
-    session.install("-rrequirements-dev.txt")
-    session.install("maturin")
-    session.run_always("maturin", "develop")
+def python(session: nox.Session):
+    session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
+    session.install(".[dev]")
     session.run("pytest")
diff --git a/examples/string-sum/pyproject.toml b/examples/string-sum/pyproject.toml
index 088f2b47..4433178e 100644
--- a/examples/string-sum/pyproject.toml
+++ b/examples/string-sum/pyproject.toml
@@ -3,7 +3,7 @@ requires = ["maturin>=1,<2"]
 build-backend = "maturin"
 
 [project]
-name = "string sum"
+name = "string_sum"
 version = "0.1.0"
 classifiers = [
     "License :: OSI Approved :: MIT License",
@@ -14,3 +14,6 @@ classifiers = [
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",
 ]
+
+[project.optional-dependencies]
+dev = ["pytest"]
diff --git a/examples/string-sum/requirements-dev.txt b/examples/string-sum/requirements-dev.txt
deleted file mode 100644
index 9ea7f14b..00000000
--- a/examples/string-sum/requirements-dev.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-pytest>=3.5.0
-pip>=21.3
-maturin>=0.12,<0.13
diff --git a/examples/word-count/.template/pre-script.rhai b/examples/word-count/.template/pre-script.rhai
index 0748517e..5ba02b12 100644
--- a/examples/word-count/.template/pre-script.rhai
+++ b/examples/word-count/.template/pre-script.rhai
@@ -1,3 +1,4 @@
 variable::set("PYO3_VERSION", "0.20.0");
 file::rename(".template/Cargo.toml", "Cargo.toml");
+file::rename(".template/pyproject.toml", "pyproject.toml");
 file::delete(".template");
diff --git a/examples/word-count/.template/pyproject.toml b/examples/word-count/.template/pyproject.toml
index b436b675..8aa3c955 100644
--- a/examples/word-count/.template/pyproject.toml
+++ b/examples/word-count/.template/pyproject.toml
@@ -1,9 +1,13 @@
 [build-system]
-requires = ["setuptools>=41.0.0", "wheel", "setuptools_rust>=1.0.0"]
+requires = ["maturin>=1,<2"]
+build-backend = "maturin"
 
 [project]
 name = "{{project-name}}"
 version = "0.1.0"
 
+[project.optional-dependencies]
+dev = ["pytest"]
+
 [tool.pytest.ini_options]
 addopts = "--benchmark-disable"
diff --git a/examples/word-count/.template/setup.cfg b/examples/word-count/.template/setup.cfg
deleted file mode 100644
index 7b861826..00000000
--- a/examples/word-count/.template/setup.cfg
+++ /dev/null
@@ -1,9 +0,0 @@
-[metadata]
-name = {{project-name}}
-version = 0.1.0
-packages =
-    word_count
-
-[options]
-include_package_data = True
-zip_safe = False
diff --git a/examples/word-count/noxfile.py b/examples/word-count/noxfile.py
index 39230d26..d64f210f 100644
--- a/examples/word-count/noxfile.py
+++ b/examples/word-count/noxfile.py
@@ -4,15 +4,14 @@ nox.options.sessions = ["test"]
 
 
 @nox.session
-def test(session):
-    session.install("-rrequirements-dev.txt")
-    session.install("maturin")
-    session.run_always("maturin", "develop")
+def test(session: nox.Session):
+    session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
+    session.install(".[dev]")
     session.run("pytest")
 
 
 @nox.session
-def bench(session):
-    session.install("-rrequirements-dev.txt")
-    session.install(".")
+def bench(session: nox.Session):
+    session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
+    session.install(".[dev]")
     session.run("pytest", "--benchmark-enable")
diff --git a/examples/word-count/pyproject.toml b/examples/word-count/pyproject.toml
index 6f88a517..e5703294 100644
--- a/examples/word-count/pyproject.toml
+++ b/examples/word-count/pyproject.toml
@@ -15,6 +15,8 @@ classifiers = [
     "Operating System :: MacOS :: MacOS X",
 ]
 
+[project.optional-dependencies]
+dev = ["pytest", "pytest-benchmark"]
 
 [tool.pytest.ini_options]
 addopts = "--benchmark-disable"
diff --git a/examples/word-count/requirements-dev.txt b/examples/word-count/requirements-dev.txt
deleted file mode 100644
index fcd8fc54..00000000
--- a/examples/word-count/requirements-dev.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-pytest>=3.5.0
-pytest-benchmark>=3.1.1