diff --git a/pkgs/by-name/pi/piper/package.nix b/pkgs/by-name/pi/piper/package.nix
index b859510173d2..8dad1176b36a 100644
--- a/pkgs/by-name/pi/piper/package.nix
+++ b/pkgs/by-name/pi/piper/package.nix
@@ -1,6 +1,20 @@
-{ lib, meson, ninja, pkg-config, gettext, fetchFromGitHub, python3
-, wrapGAppsHook3, gtk3, glib, desktop-file-utils, appstream-glib, adwaita-icon-theme
-, gobject-introspection, librsvg }:
+{
+  lib,
+  meson,
+  ninja,
+  pkg-config,
+  gettext,
+  fetchFromGitHub,
+  python3,
+  wrapGAppsHook3,
+  gtk3,
+  glib,
+  desktop-file-utils,
+  appstream-glib,
+  adwaita-icon-theme,
+  gobject-introspection,
+  librsvg,
+}:
 
 python3.pkgs.buildPythonApplication rec {
   pname = "piper";
@@ -9,17 +23,34 @@ python3.pkgs.buildPythonApplication rec {
   format = "other";
 
   src = fetchFromGitHub {
-    owner  = "libratbag";
-    repo   = "piper";
-    rev    =  version;
+    owner = "libratbag";
+    repo = "piper";
+    rev = version;
     sha256 = "sha256-j58fL6jJAzeagy5/1FmygUhdBm+PAlIkw22Rl/fLff4=";
   };
 
-  nativeBuildInputs = [ meson ninja gettext pkg-config wrapGAppsHook3 desktop-file-utils appstream-glib gobject-introspection ];
+  nativeBuildInputs = [
+    meson
+    ninja
+    gettext
+    pkg-config
+    wrapGAppsHook3
+    desktop-file-utils
+    appstream-glib
+    gobject-introspection
+  ];
   buildInputs = [
-    gtk3 glib adwaita-icon-theme python3 librsvg
+    gtk3
+    glib
+    adwaita-icon-theme
+    python3
+    librsvg
+  ];
+  propagatedBuildInputs = with python3.pkgs; [
+    lxml
+    evdev
+    pygobject3
   ];
-  propagatedBuildInputs = with python3.pkgs; [ lxml evdev pygobject3 ];
 
   mesonFlags = [
     "-Druntime-dependency-checks=false"
@@ -33,9 +64,9 @@ python3.pkgs.buildPythonApplication rec {
   meta = with lib; {
     description = "GTK frontend for ratbagd mouse config daemon";
     mainProgram = "piper";
-    homepage    = "https://github.com/libratbag/piper";
-    license     = licenses.gpl2Only;
+    homepage = "https://github.com/libratbag/piper";
+    license = licenses.gpl2Only;
     maintainers = with maintainers; [ mvnetbiz ];
-    platforms   = platforms.linux;
+    platforms = platforms.linux;
   };
 }