diff --git a/pkgs/tools/system/collectd/plugins.nix b/pkgs/tools/system/collectd/plugins.nix
index 3bef287ccf04..9ca18b06203d 100644
--- a/pkgs/tools/system/collectd/plugins.nix
+++ b/pkgs/tools/system/collectd/plugins.nix
@@ -1,6 +1,5 @@
 { lib, stdenv
 , curl
-, darwin
 , hiredis
 , iptables
 , jdk
@@ -19,7 +18,6 @@
 , libsigrok
 , libvirt
 , libxml2
-, libapparmor, libcap_ng, numactl
 , lua
 , lvm2
 , lm_sensors
diff --git a/pkgs/tools/system/datefudge/default.nix b/pkgs/tools/system/datefudge/default.nix
index 079b6b694360..d83e4aa383bc 100644
--- a/pkgs/tools/system/datefudge/default.nix
+++ b/pkgs/tools/system/datefudge/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchgit, fetchpatch, makeWrapper, coreutils }:
+{ lib, stdenv, fetchgit, makeWrapper, coreutils }:
 
 stdenv.mkDerivation rec {
   pname = "datefudge";
diff --git a/pkgs/tools/system/honcho/default.nix b/pkgs/tools/system/honcho/default.nix
index c7e25e578520..1fef47933bb5 100644
--- a/pkgs/tools/system/honcho/default.nix
+++ b/pkgs/tools/system/honcho/default.nix
@@ -1,9 +1,7 @@
 { lib, fetchFromGitHub, python3Packages }:
 
 let
-  inherit (python3Packages) python;
   pname = "honcho";
-
 in
 
 python3Packages.buildPythonApplication rec {
diff --git a/pkgs/tools/system/hw-probe/default.nix b/pkgs/tools/system/hw-probe/default.nix
index ee538f92668a..501ae69dbfd2 100644
--- a/pkgs/tools/system/hw-probe/default.nix
+++ b/pkgs/tools/system/hw-probe/default.nix
@@ -1,6 +1,5 @@
-{ config
+{ lib
 , stdenv
-, lib
 , fetchFromGitHub
 , makeWrapper
 , makePerlPath
diff --git a/pkgs/tools/system/kanata/default.nix b/pkgs/tools/system/kanata/default.nix
index 0b55c3522fb0..5a3450df0866 100644
--- a/pkgs/tools/system/kanata/default.nix
+++ b/pkgs/tools/system/kanata/default.nix
@@ -1,7 +1,6 @@
-{ fetchFromGitHub
-, fetchpatch
-, lib
+{ lib
 , rustPlatform
+, fetchFromGitHub
 , withCmd ? false
 }:
 
diff --git a/pkgs/tools/system/minijail/tools.nix b/pkgs/tools/system/minijail/tools.nix
index caaba84c0833..f54e76777612 100644
--- a/pkgs/tools/system/minijail/tools.nix
+++ b/pkgs/tools/system/minijail/tools.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPythonApplication, pkgsBuildTarget, python, minijail }:
+{ lib, buildPythonApplication, pkgsBuildTarget, python, minijail }:
 
 let
   targetClang = pkgsBuildTarget.targetPackages.clangStdenv.cc;
diff --git a/pkgs/tools/system/proot/default.nix b/pkgs/tools/system/proot/default.nix
index 8ccb540e4ec7..665be5cbabfe 100644
--- a/pkgs/tools/system/proot/default.nix
+++ b/pkgs/tools/system/proot/default.nix
@@ -1,7 +1,6 @@
 { lib, stdenv, fetchFromGitHub
 , talloc
 , pkg-config
-, git
 , ncurses
 , docutils, swig, python3, coreutils, enablePython ? true }:
 
diff --git a/pkgs/tools/system/s0ix-selftest-tool/default.nix b/pkgs/tools/system/s0ix-selftest-tool/default.nix
index 193fbb0aef5f..f75ba42ac90a 100644
--- a/pkgs/tools/system/s0ix-selftest-tool/default.nix
+++ b/pkgs/tools/system/s0ix-selftest-tool/default.nix
@@ -12,7 +12,6 @@
   pciutils,
   powertop,
   resholve,
-  stdenv,
   util-linux,
   xorg,
   xxd,