diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0171e8a43..4bb8d108b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -115,7 +115,7 @@ jobs:
         python-version: 3.x
     - name: 'Run linters'
       run: |
-        python3 -m pip install isort rstcheck toml-sort sphinx
+        python3 -m pip install ruff rstcheck toml-sort sphinx
         make lint-all
 
   # Check sanity of .tar.gz + wheel files
diff --git a/Makefile b/Makefile
index dfacfb60e..06dd2a5d5 100644
--- a/Makefile
+++ b/Makefile
@@ -12,8 +12,6 @@ PY3_DEPS = \
 	check-manifest \
 	concurrencytest \
 	coverage \
-	isort \
-	pep8-naming \
 	pylint \
 	pyperf \
 	pypinfo \
@@ -195,9 +193,6 @@ test-coverage:  ## Run test coverage.
 ruff:  ## Run ruff linter.
 	@git ls-files '*.py' | xargs $(PYTHON) -m ruff check --config=pyproject.toml --no-cache
 
-isort:  ## Run isort linter.
-	@git ls-files '*.py' | xargs $(PYTHON) -m isort --check-only --jobs=${NUM_WORKERS}
-
 _pylint:  ## Python pylint (not mandatory, just run it from time to time)
 	@git ls-files '*.py' | xargs $(PYTHON) -m pylint --rcfile=pyproject.toml --jobs=${NUM_WORKERS}
 
@@ -211,7 +206,7 @@ lint-toml:  ## Linter for pyproject.toml
 	@git ls-files '*.toml' | xargs toml-sort --check
 
 lint-all:  ## Run all linters
-	${MAKE} isort
+	${MAKE} ruff
 	${MAKE} lint-c
 	${MAKE} lint-rst
 	${MAKE} lint-toml
@@ -223,9 +218,6 @@ lint-all:  ## Run all linters
 fix-ruff:
 	@git ls-files '*.py' | xargs $(PYTHON) -m ruff --config=pyproject.toml --no-cache --fix
 
-fix-imports:  ## Fix imports with isort.
-	@git ls-files '*.py' | xargs $(PYTHON) -m isort --jobs=${NUM_WORKERS}
-
 fix-unittests:  ## Fix unittest idioms.
 	@git ls-files '*test_*.py' | xargs $(PYTHON) -m teyit --show-stats
 
@@ -234,7 +226,6 @@ fix-toml:  ## Fix pyproject.toml
 
 fix-all:  ## Run all code fixers.
 	${MAKE} fix-ruff
-	${MAKE} fix-imports
 	${MAKE} fix-unittests
 	${MAKE} fix-toml
 
diff --git a/pyproject.toml b/pyproject.toml
index b5875657b..d99de4271 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,9 +3,10 @@
 target-version = "py37"
 line-length = 79
 select = [
-    "ALL",  # to get a list of all values: `python3 -m ruff linter`
-    "D200",  # [*] One-line docstring should fit on one line (pydocstyle)
-    "D204",  # [*] 1 blank line required after class docstring (pydocstyle)
+    # To get a list of all values: `python3 -m ruff linter`.
+    "ALL",
+    "D200",  # [*] One-line docstring should fit on one line
+    "D204",  # [*] 1 blank line required after class docstring
     "D209",  # [*] Multi-line docstring closing quotes should be on a separate line
     "D212",  # [*] Multi-line docstring summary should start at the first line
     "D301",  # Use `r"""` if any backslashes in a docstring
@@ -22,7 +23,7 @@ ignore = [
     "B904",  # Within an `except` clause, raise exceptions with `raise ... from err` (PYTHON2.7 COMPAT)
     "BLE001",  # Do not catch blind exception: `Exception`
     "C4",  # flake8-comprehensions (PYTHON2.7 COMPAT)
-    # "C408",  # Unnecessary `dict` call (rewrite as a literal)
+    "C408",  # Unnecessary `dict` call (rewrite as a literal)
     "C90",  # mccabe (function `X` is too complex)
     "COM812",  # Trailing comma missing
     "D",  # pydocstyle
@@ -80,10 +81,6 @@ ignore = [
 force-single-line = true  # one import per line
 lines-after-imports = 2
 
-[tool.isort]
-force_single_line = true  # one import per line
-lines_after_imports = 2  # blank spaces after import section
-
 [tool.coverage.report]
 exclude_lines = [
     "enum.IntEnum",
diff --git a/scripts/internal/git_pre_commit.py b/scripts/internal/git_pre_commit.py
index 5fefac8b6..92852f836 100755
--- a/scripts/internal/git_pre_commit.py
+++ b/scripts/internal/git_pre_commit.py
@@ -4,20 +4,10 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""This gets executed on 'git commit' and rejects the commit in case the
-submitted code does not pass validation. Validation is run only against
-the files which were modified in the commit. Checks:
-
-- assert no space at EOLs
-- assert not pdb.set_trace in code
-- assert no bare except clause ("except:") in code
-- assert "isort" checks pass
-- assert C linter checks pass
-- assert RsT checks pass
-- assert TOML checks pass
-- abort if files were added/renamed/removed and MANIFEST.in was not updated
-
-Install this with "make install-git-hooks".
+"""This gets executed on 'git commit' and rejects the commit in case
+the submitted code does not pass validation. Validation is run only
+against the files which were modified in the commit. Install this with
+"make install-git-hooks".
 """
 
 from __future__ import print_function
@@ -116,15 +106,6 @@ def ruff(files):
         )
 
 
-def isort(files):
-    print("running isort (%s)" % len(files))
-    cmd = [PYTHON, "-m", "isort", "--check-only"] + files
-    if subprocess.call(cmd) != 0:
-        msg = "python code didn't pass 'isort' style check; "
-        msg += "try running 'make fix-imports'"
-        return sys.exit(msg)
-
-
 def c_linter(files):
     print("running clinter (%s)" % len(files))
     # XXX: we should escape spaces and possibly other amenities here
@@ -151,7 +132,6 @@ def main():
     py_files, c_files, rst_files, toml_files, new_rm_mv = git_commit_files()
     if py_files:
         ruff(py_files)
-        isort(py_files)
     if c_files:
         c_linter(c_files)
     if rst_files:
diff --git a/scripts/internal/winmake.py b/scripts/internal/winmake.py
index c2c20bc0a..cb039d02d 100755
--- a/scripts/internal/winmake.py
+++ b/scripts/internal/winmake.py
@@ -38,7 +38,6 @@
 PYPY = '__pypy__' in sys.builtin_module_names
 DEPS = [
     "coverage",
-    "nose",
     "pdbpp",
     "pip",
     "pyperf",