diff --git a/.github/workflows/test-ui.yml b/.github/workflows/test-ui.yml
index a1ebf91..87b8b94 100644
--- a/.github/workflows/test-ui.yml
+++ b/.github/workflows/test-ui.yml
@@ -32,7 +32,7 @@ jobs:
           mypy src
       - name: Run Mac GUI tests
         run: |
-          CI_MODE=YES python setup.py py2app --alias | cat
+          CI_MODE=YES python py2app_setup.py py2app --alias | cat
           ./dist/CiPomodouroboros.app/Contents/MacOS/CiPomodouroboros
 
   model-tests:
diff --git a/pindeps b/pindeps
new file mode 100755
index 0000000..4ba0327
--- /dev/null
+++ b/pindeps
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+pip-compile --strip-extras --quiet --upgrade --allow-unsafe --no-emit-index-url
diff --git a/setup.py b/py2app_setup.py
similarity index 88%
rename from setup.py
rename to py2app_setup.py
index 69a89f9..3608902 100644
--- a/setup.py
+++ b/py2app_setup.py
@@ -2,8 +2,10 @@
 This is a setup.py script generated by py2applet
 
 Usage:
-    python setup.py py2app
+    python py2app_setup.py py2app
 """
+
+import py2app
 import os
 
 from setuptools import setup
@@ -33,13 +35,13 @@ def check_mode() -> str:
         "LSUIElement": True,
         "NSRequiresAquaSystemAppearance": False,
         "CFBundleIdentifier": f"im.glyph.and.this.is.{MODE}pomodouroboros",
+        "CFBundleName": f"{MODE}Pomodouroboros",
     },
     "iconfile": f"{MODE}icon.icns",
+    "app": APP,
 }
 
 setup(
-    name=f"{MODE}Pomodouroboros",
-    app=APP,
     data_files=DATA_FILES,
     options={"py2app": OPTIONS},
 )
diff --git a/pyproject.toml b/pyproject.toml
index f8c3d84..74e5a6e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,52 @@
 [build-system]
 requires = [
-  "setuptools>=42",
+  "setuptools>=42,<71.0.0",
   "wheel",
 ]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "Pomodouroboros"
+authors=[
+  { name = "Glyph", email = "code@glyph.im" },
+]
+description = "An extremely opinionated pomodoro system."
+readme = "README.md"
+dependencies = [
+  # core dependencies
+  "twisted[tls,http2]",
+  "python-dateutil",
+  "ulid-py",
+  "datetype",
+  "fritter",
+  "setuptools<71.0.0",
+
+  "pip-tools",
+  "mypy",
+  "mypy-zope",
+  "types-python-dateutil",
+
+  "py2app ; sys_platform == 'darwin'",
+  "pyobjc-core ; sys_platform == 'darwin'",
+  "pyobjc-framework-Cocoa ; sys_platform == 'darwin'",
+  "pyobjc-framework-ExceptionHandling ; sys_platform == 'darwin'",
+  "pyobjc-framework-UserNotifications ; sys_platform == 'darwin'",
+  "pyobjc-framework-CFNetwork ; sys_platform == 'darwin'",
+  "quickmacapp ; sys_platform == 'darwin'",
+  "quickmachotkey ; sys_platform == 'darwin'",
+  "encrust ; sys_platform == 'darwin'",
+]
+classifiers = [
+    "Programming Language :: Python :: 3",
+]
+version = "0.4.8"
+
+[project.urls]
+Source = "https://github.com/glyph/Pomodouroboros"
+Bug-Tracker = "https://github.com/glyph/Pomodouroboros/issues"
+[project.scripts]
+pom = "pomodouroboros.cli:main"
+
 [tool.black]
 line-length = 79
 
@@ -17,3 +59,4 @@ line_length = 79
 ignore = [
   "E731",
 ]
+
diff --git a/requirements.in b/requirements.in
deleted file mode 100644
index f3ba640..0000000
--- a/requirements.in
+++ /dev/null
@@ -1,22 +0,0 @@
-# requirements
-py2app ; sys_platform == 'darwin'
-pip-tools
-
-pyobjc-core ; sys_platform == 'darwin'
-pyobjc-framework-Cocoa ; sys_platform == 'darwin'
-pyobjc-framework-ExceptionHandling ; sys_platform == 'darwin'
-pyobjc-framework-UserNotifications ; sys_platform == 'darwin'
-pyobjc-framework-CFNetwork ; sys_platform == 'darwin'
-
-twisted[tls,http2]
-mypy
-mypy-zope
-python-dateutil
-types-python-dateutil
-ulid-py
-quickmacapp ; sys_platform == 'darwin'
-quickmachotkey ; sys_platform == 'darwin'
-encrust; sys_platform == 'darwin'
-datetype
-fritter
-setuptools<71.0.0
diff --git a/requirements.txt b/requirements.txt
index 37b3828..fcc922c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile with Python 3.12
 # by the following command:
 #
-#    pip-compile --allow-unsafe --no-emit-index-url
+#    pip-compile --allow-unsafe --no-emit-index-url --strip-extras
 #
 altgraph==0.17.4
     # via
@@ -45,14 +45,14 @@ cython-test-exception-raiser==1.0.2
     # via twisted
 datetype==2024.2.28
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   fritter
 delocate==0.12.0
     # via encrust
 encrust==2024.9.3 ; sys_platform == "darwin"
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 fritter==0.0.9
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 h11==0.14.0
     # via httpcore
 h2==4.1.0
@@ -63,7 +63,7 @@ hpack==4.0.0
     # via h2
 httpcore==1.0.7
     # via httpx
-httpx[http2]==0.28.0
+httpx==0.28.0
     # via twisted
 hyperframe==6.0.1
     # via h2
@@ -87,24 +87,24 @@ modulegraph==0.19.6
     # via py2app
 mypy==1.13.0
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   mypy-zope
 mypy-extensions==1.0.0
     # via mypy
 mypy-zope==1.0.9
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 packaging==24.2
     # via
     #   build
     #   delocate
     #   py2app
 pip-tools==7.4.1
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 priority==1.3.0
     # via twisted
 py2app==0.28.8 ; sys_platform == "darwin"
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   encrust
 pyasn1==0.6.1
     # via
@@ -118,7 +118,7 @@ pyhamcrest==2.1.0
     # via twisted
 pyobjc-core==10.3.2 ; sys_platform == "darwin"
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   pyobjc-framework-cfnetwork
     #   pyobjc-framework-cocoa
     #   pyobjc-framework-exceptionhandling
@@ -127,11 +127,11 @@ pyobjc-core==10.3.2 ; sys_platform == "darwin"
     #   twisted
 pyobjc-framework-cfnetwork==10.3.2 ; sys_platform == "darwin"
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   twisted
 pyobjc-framework-cocoa==10.3.2 ; sys_platform == "darwin"
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   pyobjc-framework-cfnetwork
     #   pyobjc-framework-exceptionhandling
     #   pyobjc-framework-usernotifications
@@ -139,11 +139,11 @@ pyobjc-framework-cocoa==10.3.2 ; sys_platform == "darwin"
     #   twisted
 pyobjc-framework-exceptionhandling==10.3.2 ; sys_platform == "darwin"
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   quickmacapp
 pyobjc-framework-usernotifications==10.3.2 ; sys_platform == "darwin"
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   quickmacapp
 pyopenssl==24.3.0
     # via twisted
@@ -154,11 +154,11 @@ pyproject-hooks==1.2.0
 pyserial==3.5
     # via twisted
 python-dateutil==2.9.0.post0
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 quickmacapp==2023.4.24 ; sys_platform == "darwin"
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 quickmachotkey==2023.11.17 ; sys_platform == "darwin"
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 service-identity==24.2.0
     # via twisted
 six==1.16.0
@@ -167,13 +167,13 @@ sniffio==1.3.1
     # via anyio
 sortedcontainers==2.4.0
     # via hypothesis
-twisted[http2,tls]==24.10.0
+twisted==24.10.0
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   encrust
     #   quickmacapp
 types-python-dateutil==2.9.0.20241003
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 typing-extensions==4.12.2
     # via
     #   delocate
@@ -182,7 +182,7 @@ typing-extensions==4.12.2
 tzdata==2024.2
     # via fritter
 ulid-py==1.1.0
-    # via -r requirements.in
+    # via Pomodouroboros (pyproject.toml)
 wheel==0.45.1
     # via pip-tools
 wheel-filename==1.4.1
@@ -202,7 +202,7 @@ pip==24.3.1
     # via pip-tools
 setuptools==70.3.0
     # via
-    #   -r requirements.in
+    #   Pomodouroboros (pyproject.toml)
     #   incremental
     #   modulegraph
     #   pip-tools
diff --git a/runme b/runme
index 33332d4..e21a8f0 100755
--- a/runme
+++ b/runme
@@ -3,6 +3,6 @@
 mypy ./src;
 rm -fr ./build ./dist;
 # https://github.com/ronaldoussoren/py2app/issues/444
-python setup.py py2app --alias | cat;
+python py2app_setup.py py2app --alias | cat;
 rm -fr ./build;
 exec ./dist/Pomodouroboros.app/Contents/MacOS/Pomodouroboros;
diff --git a/setup.cfg b/setup.cfg
index c34bec4..3b467b1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,30 +1,3 @@
-[metadata]
-name = Pomodouroboros
-version = 0.4.7
-author = Glyph
-author_email = glyph@glyph.im
-description = An extremely opinionated pomodoro system.
-long_description = file: README.md
-long_description_content_type = text/markdown
-url = https://github.com/glyph/Pomodouroboros
-project_urls =
-    Bug Tracker = https://github.com/glyph/Pomodouroboros/issues
-classifiers =
-    Programming Language :: Python :: 3
-
-[options]
-package_dir =
-    = src
-packages = find:
-python_requires = >=3.6
-
-[options.packages.find]
-where = src
-
-[options.entry_points]
-console_scripts =
-    pom = pomodouroboros.cli:main
-
 [flake8]
 # ObjC method names create too many impossible-to-shorten lines
 # W503 seems at odds with black?
diff --git a/src/scratch.py b/src/scratch.py
deleted file mode 100644
index 19d806c..0000000
--- a/src/scratch.py
+++ /dev/null
@@ -1,57 +0,0 @@
-from contextlib import contextmanager
-from typing import Any, Iterator
-
-from pomodouroboros.model.observables import Changes, Observer, observable
-
-
-@observable()
-class Box:
-    observer: Observer
-    contents: int
-
-
-class ShowChanges:
-    @contextmanager
-    def added(self, key: object, new: object) -> Iterator[None]:
-        print(f"will add {key} as {new}")
-        yield
-        print(f"did add {key} as {new}")
-
-    @contextmanager
-    def removed(self, key: object, old: object) -> Iterator[None]:
-        print(f"will remove {key} (was {old})")
-        yield
-        print(f"did remove {key} (was {old})")
-
-    @contextmanager
-    def changed(self, key: object, old: object, new: object) -> Iterator[None]:
-        print(f"will change {key} from {old} to {new}")
-        yield
-        print(f"did change {key} from {old} to {new}")
-
-    def child(self, key: object) -> Changes[Any, Any]:
-        return ShowChanges()
-
-
-box = Box(ShowChanges(), 1)
-box.contents += 1
-
-
-from pomodouroboros.model.observables import ObservableList, PathObserver
-
-
-@observable()
-class Shelf:
-    observer: Observer
-    boxes: ObservableList[Box]
-
-
-def newShelf(observer: Changes[tuple[object, ...], object]) -> Shelf:
-    p: PathObserver[object] = PathObserver(observer, (), "")
-    return Shelf(p, ObservableList(p.child("boxes")))
-
-
-shelf = newShelf(ShowChanges())
-shelf.boxes.append(box)
-box.observer = shelf.observer.child("boxes").child(0)
-box.contents += 1
diff --git a/testme b/testme
index ddc022a..de03bc4 100755
--- a/testme
+++ b/testme
@@ -4,5 +4,5 @@ mypy ./src;
 rm -fr ./dist/TestPomodouroboros.app;
 export TEST_MODE=YES;
 # https://github.com/ronaldoussoren/py2app/issues/444
-python setup.py py2app --alias | cat;
+python py2app_setup.py py2app --alias | cat;
  ./dist/TestPomodouroboros.app/Contents/MacOS/TestPomodouroboros;