diff --git a/.gitignore b/.gitignore
index 27e2aac..613149a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 *.egg-info
 build
 dist
+
+cwltest/_version.py
diff --git a/MANIFEST.in b/MANIFEST.in
index 3aec21c..40bd4c8 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
-include Makefile gittaggers.py test-requirements.txt mypy-requirements.txt requirements.txt tox.ini mypy.ini
+include Makefile test-requirements.txt mypy-requirements.txt requirements.txt tox.ini mypy.ini
 include dev-requirements.txt .flake8 .coveragerc release-test.sh
 include docs/Makefile docs/conf.py docs/requirements.txt docs/_static/favicon.ico docs/*.rst
 include cwltest/*.yml
diff --git a/Makefile b/Makefile
index 0e5889e..16b3c52 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ PYSOURCES=$(wildcard ${MODULE}/**.py tests/*.py) setup.py
 DEVPKGS=-rdev-requirements.txt -rtest-requirements.txt -rmypy-requirements.txt
 DEBDEVPKGS=pep8 python-autopep8 pylint python-coverage pydocstyle sloccount \
 	   python-flake8 python-mock shellcheck
-VERSION=2.3.$(shell TZ=UTC git log --first-parent --max-count=1 \
+VERSION=2.4.$(shell TZ=UTC git log --first-parent --max-count=1 \
 	--format=format:%cd --date=format-local:%Y%m%d%H%M%S)
 
 ## all                    : default task (install in dev mode)
@@ -105,10 +105,10 @@ codespell:
 
 ## format                 : check/fix all code indentation and formatting (runs black)
 format: $(PYSOURCES) mypy-stubs
-	black $^
+	black --exclude cwltest/_version.py $^
 
 format-check: $(PYSOURCES) mypy-stubs
-	black --diff --check $^
+	black --diff --check --exclude cwltest/_version.py $^
 
 ## pylint                 : run static code analysis on Python code
 pylint: $(PYSOURCES)
@@ -151,7 +151,7 @@ test: $(PYSOURCES)
 
 ## testcov                : run the cwltest test suite and collect coverage
 testcov: $(PYSOURCES)
-	python setup.py test --addopts "--cov" ${PYTEST_EXTRA}
+	pytest --cov ${PYTEST_EXTRA}
 
 sloccount.sc: $(PYSOURCES) Makefile
 	sloccount --duplicates --wide --details $^ > $@
@@ -165,7 +165,7 @@ list-author-emails:
 	@git log --format='%aN,%aE' | sort -u | grep -v 'root'
 
 mypy3: mypy
-mypy: $(filter-out setup.py gittagger.py,$(PYSOURCES))
+mypy: $(filter-out setup.py,$(PYSOURCES))
 	MYPYPATH=$$MYPYPATH:mypy-stubs mypy $^
 
 pyupgrade: $(filter-out schema_salad/metaschema.py,$(PYSOURCES))
@@ -176,7 +176,9 @@ release-test: FORCE
 	git diff-index --quiet HEAD -- || ( echo You have uncommitted changes, please commit them and try again; false )
 	./release-test.sh
 
-release: release-test
+release:
+	export SETUPTOOLS_SCM_PRETEND_VERSION=${VERSION} && \
+	./release-test.sh && \
 	. testenv2/bin/activate && \
 		pip install build && \
 		python -m build testenv2/src/${PACKAGE} && \
@@ -184,8 +186,8 @@ release: release-test
 		twine upload testenv2/src/${PACKAGE}/dist/* && \
 		git tag ${VERSION} && git push --tags
 
-flake8: $(PYSOURCES)
-	flake8 $^
+flake8: FORCE
+	flake8 $(PYSOURCES)
 
 FORCE:
 
diff --git a/gittaggers.py b/gittaggers.py
deleted file mode 100644
index 39e79f7..0000000
--- a/gittaggers.py
+++ /dev/null
@@ -1,37 +0,0 @@
-import subprocess
-import time
-
-import pkg_resources
-from setuptools.command.egg_info import egg_info
-
-SETUPTOOLS_VER = pkg_resources.get_distribution(
-    "setuptools").version.split('.')
-
-RECENT_SETUPTOOLS = int(SETUPTOOLS_VER[0]) > 40 or (
-    int(SETUPTOOLS_VER[0]) == 40 and int(SETUPTOOLS_VER[1]) > 0) or (
-        int(SETUPTOOLS_VER[0]) == 40 and int(SETUPTOOLS_VER[1]) == 0 and
-        int(SETUPTOOLS_VER[2]) > 0)
-
-class EggInfoFromGit(egg_info):
-    """Tag the build with git commit timestamp.
-
-    If a build tag has already been set (e.g., "egg_info -b", building
-    from source package), leave it alone.
-    """
-
-    def git_timestamp_tag(self):
-        gitinfo = subprocess.check_output(
-            ['git', 'log', '--first-parent', '--max-count=1',
-             '--format=format:%ct', '.']).strip()
-        return time.strftime('.%Y%m%d%H%M%S', time.gmtime(int(gitinfo)))
-
-    def tags(self):
-        if self.tag_build is None:
-            try:
-                self.tag_build = self.git_timestamp_tag()
-            except subprocess.CalledProcessError:
-                pass
-        return egg_info.tags(self)
-
-    if RECENT_SETUPTOOLS:
-        vtags = property(tags)
diff --git a/setup.py b/setup.py
index 1e19380..13bd5ec 100644
--- a/setup.py
+++ b/setup.py
@@ -2,26 +2,18 @@
 import os
 import pathlib
 import sys
+from typing import List
 
-import setuptools.command.egg_info as egg_info_cmd
 from setuptools import setup
 
 SETUP_DIR = os.path.dirname(__file__)
 README = os.path.join(SETUP_DIR, "README.rst")
 
-try:
-    import gittaggers
-
-    tagger = gittaggers.EggInfoFromGit
-except ImportError:
-    tagger = egg_info_cmd.egg_info
-
 needs_pytest = {"pytest", "test", "ptr"}.intersection(sys.argv)
-pytest_runner = ["pytest < 8", "pytest-runner"] if needs_pytest else []
+pytest_runner: List[str] = ["pytest < 8", "pytest-runner"] if needs_pytest else []
 
 setup(
     name="cwltest",
-    version="2.3",  # update the VERSION prefix in the Makefile as well 🙂
     description="Common Workflow Language testing framework",
     long_description=open(README).read(),
     long_description_content_type="text/x-rst",
@@ -30,8 +22,9 @@
     url="https://github.com/common-workflow-language/cwltest",
     download_url="https://github.com/common-workflow-language/cwltest",
     license="Apache 2.0",
-    python_requires=">=3.8, <4",
-    setup_requires=[] + pytest_runner,
+    python_requires=">=3.8,<3.13",
+    use_scm_version=True,
+    setup_requires=pytest_runner + ["setuptools_scm>=8.0.4,<9"],
     packages=["cwltest", "cwltest.tests"],
     package_dir={"cwltest.tests": "tests"},
     package_data={"cwltest": ["py.typed"], "tests": ["test-data/*"]},
@@ -57,7 +50,6 @@
         ],
     },
     zip_safe=True,
-    cmdclass={"egg_info": tagger},
     classifiers=[
         "Environment :: Console",
         "License :: OSI Approved :: Apache Software License",