diff --git a/build-aux/meson_post_install.py b/build-aux/meson_post_install.py
index 5a61fc2d..a496a557 100644
--- a/build-aux/meson_post_install.py
+++ b/build-aux/meson_post_install.py
@@ -3,7 +3,10 @@
 import os
 import subprocess
 
-build_root = os.environ.get('MESON_BUILD_ROOT')
-source_root = os.environ.get('MESON_SOURCE_ROOT')
+build_root = os.environ.get("MESON_BUILD_ROOT")
+source_root = os.environ.get("MESON_SOURCE_ROOT")
 
-subprocess.call(['mv', build_root, 'gradience/constants.py', source_root, 'gradience/constants.py'])
+subprocess.call(
+    ["mv", build_root, "gradience/constants.py",
+        source_root, "gradience/constants.py"]
+)