diff --git a/.ci/requirements.txt b/.ci/requirements.txt
index d2d06d446ee338e2332147b19a76dd1124706355..2955c65e20383cae48c371c1a67b2c4009c94a6c 100644
--- a/.ci/requirements.txt
+++ b/.ci/requirements.txt
@@ -10,3 +10,4 @@ Sphinx==3.0.3
 xunitparser==1.3.3
 asttokens
 virtualenv
+flake8-import-order
diff --git a/tools/hooks/run-flake8.py b/tools/hooks/run-flake8.py
index bdb08fbdaf15889397a3002b10a1537cfda12b7c..54bf4ab228ca11a8deb5a1a0987f27829dee1b39 100755
--- a/tools/hooks/run-flake8.py
+++ b/tools/hooks/run-flake8.py
@@ -2,12 +2,39 @@
 
 from pathlib import Path
 import runpy
-import subprocess
 import sys
+from types import ModuleType
+
+from flake8.main.cli import main
+from flake8_import_order.styles import PEP8
+import pkg_resources
 
 
 mod = runpy.run_path(str(Path(__file__).with_name('checkerlib.py')))
 
+args = mod['parser'].parse_args()
+
+
+# flake8-import-order's PEP8 style merges app imports and relative imports
+class AllSeparateStyle(PEP8):
+    @staticmethod
+    def same_section(previous, current):
+        return current.type == previous.type
+
+
+# flake8-import-order is almost only configurable through entry_points
+# ugly hack to avoid having to create a separate package with entry_point, setup, etc.
+style_mod = ModuleType('fake_module_all_separate')
+style_mod.AllSeparateStyle = AllSeparateStyle
+sys.modules['fake_module_all_separate'] = style_mod
+
+d = pkg_resources.Distribution('/lol.py')
+ep = pkg_resources.EntryPoint.parse('fake_module_all_separate = fake_module_all_separate:AllSeparateStyle')
+ep.dist = d
+d._ep_map = {'flake8_import_order.styles': {'fake_module_all_separate': ep}}
+pkg_resources.working_set.add(d, 'fake_module_all_separate')
+
+
 # E501: Line too long
 #   Disabled because it doesn't allow exceptions, for example URLs or log
 #   messages shouldn't be split, less readable or searchable.
@@ -15,11 +42,9 @@
 #   Disabling it follows pep8 (see W504).
 # E266: Too many leading '#' for block comment
 #   But it's a nice visual separator sometimes.
-
-args = mod['parser'].parse_args()
-
-execution = subprocess.run([
-    'flake8', '--ignore=E501,W503,E266',
+main([
+    '--ignore=E501,W503,E266',
+    '--application-import-names=weboob',
+    '--import-order-style=fake_module_all_separate',
     *map(str, mod['files_to_check'](args)),
 ])
-sys.exit(execution.returncode)
diff --git a/tools/pyflakes-strict.sh b/tools/pyflakes-strict.sh
index 13390910166eb7858758154944fbb6147ab32c52..9f0628fce98ca7a394ff5cf9cedaf5edd63ea7aa 100755
--- a/tools/pyflakes-strict.sh
+++ b/tools/pyflakes-strict.sh
@@ -10,6 +10,7 @@ die () {
 }
 
 $PYTHON3 -c 'import flake8' || die "Please install flake8 (e.g. apt install flake8)"
+$PYTHON3 -c 'import flake8_import_order' || die "Please install flake8-import-order (e.g. pip3 install flake8-import-order)"
 $PYTHON3 -c 'import bugbear' || die "Please install flake8-bugbear (e.g. pip3 install flake8-bugbear)"
 $PYTHON3 -c 'import asttokens' || die "Please install asttokens (e.g. apt install python3-asttokens)"