diff --git a/pkgs/tools/X11/sunpaper/default.nix b/pkgs/tools/X11/sunpaper/default.nix
index 9f760bb4a93f..116b0225ab0f 100644
--- a/pkgs/tools/X11/sunpaper/default.nix
+++ b/pkgs/tools/X11/sunpaper/default.nix
@@ -3,7 +3,6 @@
 , fetchFromGitHub
 , sunwait
 , wallutils
-, rPackages
 }:
 
 stdenvNoCC.mkDerivation rec {
@@ -27,7 +26,7 @@ stdenvNoCC.mkDerivation rec {
       --replace "sunwait" "${sunwait}/bin/sunwait" \
       --replace "setwallpaper" "${wallutils}/bin/setwallpaper" \
       --replace '$HOME/sunpaper/images/' "$out/share/sunpaper/images/"
-    '';
+  '';
 
   installPhase = ''
     mkdir -p "$out/bin" "$out/share/sunpaper/images"
diff --git a/pkgs/tools/typesetting/lowdown/default.nix b/pkgs/tools/typesetting/lowdown/default.nix
index e4c904fffbc6..3a108d7c8ed0 100644
--- a/pkgs/tools/typesetting/lowdown/default.nix
+++ b/pkgs/tools/typesetting/lowdown/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, fixDarwinDylibNames, which, dieHook
-, enableShared ? !(stdenv.hostPlatform.isStatic)
+, enableShared ? !stdenv.hostPlatform.isStatic
 , enableStatic ? stdenv.hostPlatform.isStatic
 # for passthru.tests
 , nix
@@ -46,7 +46,6 @@ stdenv.mkDerivation rec {
 
   postInstall =
     let
-      inherit (stdenv.hostPlatform.extensions) sharedLibrary;
       soVersion = "3";
     in
 
diff --git a/pkgs/tools/typesetting/satysfi/default.nix b/pkgs/tools/typesetting/satysfi/default.nix
index 16fe6c579c0a..8b341298f311 100644
--- a/pkgs/tools/typesetting/satysfi/default.nix
+++ b/pkgs/tools/typesetting/satysfi/default.nix
@@ -1,15 +1,15 @@
-{ lib, stdenv, fetchFromGitHub, ruby, ocamlPackages
+{ lib, fetchFromGitHub, ocamlPackages
 , ipaexfont, junicode, lmodern, lmmath
 }:
 let
-  camlpdf = ocamlPackages.camlpdf.overrideAttrs (o: {
+  camlpdf = ocamlPackages.camlpdf.overrideAttrs {
     src = fetchFromGitHub {
       owner = "gfngfn";
       repo = "camlpdf";
       rev = "v2.3.1+satysfi";
       sha256 = "1s8wcqdkl1alvfcj67lhn3qdz8ikvd1v64f4q6bi4c0qj9lmp30k";
     };
-  });
+  };
   otfm = ocamlPackages.otfm.overrideAttrs (o: {
     src = fetchFromGitHub {
       owner = "gfngfn";
diff --git a/pkgs/tools/typesetting/tex/mftrace/default.nix b/pkgs/tools/typesetting/tex/mftrace/default.nix
index 9f061630e224..4b8a0350c8b1 100644
--- a/pkgs/tools/typesetting/tex/mftrace/default.nix
+++ b/pkgs/tools/typesetting/tex/mftrace/default.nix
@@ -3,7 +3,6 @@
 , lib
 , makeWrapper
 , autoreconfHook
-, buildEnv
 , python3
 , fontforge
 , potrace
diff --git a/pkgs/tools/typesetting/tex/pgf-tikz/pgf-umlsd.nix b/pkgs/tools/typesetting/tex/pgf-tikz/pgf-umlsd.nix
index fe08d6823396..4fd32aadf8ce 100644
--- a/pkgs/tools/typesetting/tex/pgf-tikz/pgf-umlsd.nix
+++ b/pkgs/tools/typesetting/tex/pgf-tikz/pgf-umlsd.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 }:
 
-stdenvNoCC.mkDerivation (finalAttrs: {
+stdenvNoCC.mkDerivation {
   pname = "pgf-umlcd";
   version = "unstable-2020-05-28";
 
@@ -30,4 +30,4 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = platforms.unix;
   };
-})
+}
diff --git a/pkgs/tools/video/wtwitch/default.nix b/pkgs/tools/video/wtwitch/default.nix
index e03deea51fc2..9b2a9a7be031 100644
--- a/pkgs/tools/video/wtwitch/default.nix
+++ b/pkgs/tools/video/wtwitch/default.nix
@@ -10,12 +10,10 @@
 , makeWrapper
 , mplayer
 , mpv
-, ncurses
 , procps
 , scdoc
 , stdenv
 , streamlink
-, sudo
 , vlc
 }:
 
diff --git a/pkgs/tools/virtualization/awsebcli/default.nix b/pkgs/tools/virtualization/awsebcli/default.nix
index f9828abe629c..696b0b822e51 100644
--- a/pkgs/tools/virtualization/awsebcli/default.nix
+++ b/pkgs/tools/virtualization/awsebcli/default.nix
@@ -18,7 +18,7 @@ let
         cement = changeVersion super.cement.overridePythonAttrs "2.8.2" "sha256-h2XtBSwGHXTk0Bia3cM9Jo3lRMohmyWdeXdB9yXkItI=";
         wcwidth = changeVersion super.wcwidth.overridePythonAttrs "0.1.9" "sha256-7nOGKGKhVr93/5KwkDT8SCXdOvnPgbxbNgZo1CXzxfE=";
         semantic-version = changeVersion super.semantic-version.overridePythonAttrs "2.8.5" "sha256-0sst4FWHYpNGebmhBOguynr0SMn0l00fPuzP9lHfilQ=";
-        pyyaml = super.pyyaml.overridePythonAttrs (oldAttrs: rec {
+        pyyaml = super.pyyaml.overridePythonAttrs rec {
           version = "5.4.1";
           checkPhase = ''
             runHook preCheck
@@ -30,7 +30,7 @@ let
             inherit version;
             hash = "sha256-YHd0y7oocyv6gCtUuqdIQhX1MJkQVbtWLvvtWy8gpF4=";
           };
-        });
+        };
       };
     };
 in
diff --git a/pkgs/tools/virtualization/google-compute-engine/default.nix b/pkgs/tools/virtualization/google-compute-engine/default.nix
index ad187544aea2..c980a45bbef2 100644
--- a/pkgs/tools/virtualization/google-compute-engine/default.nix
+++ b/pkgs/tools/virtualization/google-compute-engine/default.nix
@@ -3,7 +3,6 @@
 , buildPythonPackage
 , bash
 , bashInteractive
-, systemd
 , util-linux
 , boto
 , setuptools
diff --git a/pkgs/tools/virtualization/google-guest-agent/default.nix b/pkgs/tools/virtualization/google-guest-agent/default.nix
index f531b5ca84ac..f34a56f5d143 100644
--- a/pkgs/tools/virtualization/google-guest-agent/default.nix
+++ b/pkgs/tools/virtualization/google-guest-agent/default.nix
@@ -1,4 +1,4 @@
-{ buildGoModule, fetchFromGitHub, fetchpatch, lib, coreutils, makeWrapper
+{ buildGoModule, fetchFromGitHub, lib, coreutils, makeWrapper
 , google-guest-configs, google-guest-oslogin, iproute2, dhcp, procps
 }:
 
diff --git a/pkgs/tools/virtualization/google-guest-configs/default.nix b/pkgs/tools/virtualization/google-guest-configs/default.nix
index dd3c01c6229a..73dd3c93d255 100644
--- a/pkgs/tools/virtualization/google-guest-configs/default.nix
+++ b/pkgs/tools/virtualization/google-guest-configs/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, makeWrapper, substituteAll
+{ stdenv, lib, fetchFromGitHub, makeWrapper
 , ipcalc, iproute2, util-linux, coreutils, ethtool, gnugrep, gnused, nvme-cli }:
 
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/virtualization/google-guest-oslogin/default.nix b/pkgs/tools/virtualization/google-guest-oslogin/default.nix
index 68ca58fb64ff..84e6a865dcd6 100644
--- a/pkgs/tools/virtualization/google-guest-oslogin/default.nix
+++ b/pkgs/tools/virtualization/google-guest-oslogin/default.nix
@@ -1,6 +1,5 @@
-{ stdenv
-, lib
-, bashInteractive
+{ lib
+, stdenv
 , curl
 , fetchFromGitHub
 , json_c
diff --git a/pkgs/tools/virtualization/ovftool/default.nix b/pkgs/tools/virtualization/ovftool/default.nix
index bbd80391c7ae..5f501647783e 100644
--- a/pkgs/tools/virtualization/ovftool/default.nix
+++ b/pkgs/tools/virtualization/ovftool/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, system ? builtins.currentSystem, ovftoolBundles ? {}
-, requireFile, autoPatchelfHook, makeWrapper, unzip
+, autoPatchelfHook, makeWrapper, unzip
 , glibc, c-ares, libxcrypt-legacy, expat, icu60, xercesc, zlib
 }:
 
diff --git a/pkgs/tools/wayland/gtklock/default.nix b/pkgs/tools/wayland/gtklock/default.nix
index 8a57fd581037..3d74344a4e76 100644
--- a/pkgs/tools/wayland/gtklock/default.nix
+++ b/pkgs/tools/wayland/gtklock/default.nix
@@ -1,7 +1,6 @@
 { lib
 , stdenv
 , fetchFromGitHub
-, pkgs
 , pam
 , scdoc
 , gtk3
diff --git a/pkgs/tools/wayland/mpvpaper/default.nix b/pkgs/tools/wayland/mpvpaper/default.nix
index 3f98e8ef8c21..51edcc0ea3a2 100644
--- a/pkgs/tools/wayland/mpvpaper/default.nix
+++ b/pkgs/tools/wayland/mpvpaper/default.nix
@@ -1,7 +1,6 @@
 { stdenv
 , lib
 , meson
-, cmake
 , ninja
 , wlroots
 , wayland
diff --git a/pkgs/tools/wayland/swww/default.nix b/pkgs/tools/wayland/swww/default.nix
index 2bd2dbcf7e38..3555af7c0424 100644
--- a/pkgs/tools/wayland/swww/default.nix
+++ b/pkgs/tools/wayland/swww/default.nix
@@ -1,4 +1,4 @@
-{ config, lib, pkgs, fetchFromGitHub, rustPlatform, pkg-config, lz4, libxkbcommon }:
+{ lib, fetchFromGitHub, rustPlatform, pkg-config, lz4, libxkbcommon }:
 rustPlatform.buildRustPackage rec {
   pname = "swww";
   version = "0.8.1";
diff --git a/pkgs/tools/wayland/waynergy/default.nix b/pkgs/tools/wayland/waynergy/default.nix
index dd2e6502bc8c..646ed3698504 100644
--- a/pkgs/tools/wayland/waynergy/default.nix
+++ b/pkgs/tools/wayland/waynergy/default.nix
@@ -10,7 +10,6 @@
 , wayland-protocols
 , wl-clipboard
 , libxkbcommon
-, cmake
 , libressl
 }:
 stdenv.mkDerivation rec {
diff --git a/pkgs/tools/wayland/wayout/default.nix b/pkgs/tools/wayland/wayout/default.nix
index 041c3dfe8cce..ca3a3f419116 100644
--- a/pkgs/tools/wayland/wayout/default.nix
+++ b/pkgs/tools/wayland/wayout/default.nix
@@ -1,7 +1,6 @@
 { lib
-, stdenv
-, fetchFromSourcehut
 , rustPlatform
+, fetchFromSourcehut
 }:
 
 rustPlatform.buildRustPackage rec {
diff --git a/pkgs/tools/wayland/wlay/default.nix b/pkgs/tools/wayland/wlay/default.nix
index a766a49d25d9..3a80e0627e37 100644
--- a/pkgs/tools/wayland/wlay/default.nix
+++ b/pkgs/tools/wayland/wlay/default.nix
@@ -15,7 +15,7 @@
 , wayland-scanner
 }:
 
-stdenv.mkDerivation (finalAttrs: {
+stdenv.mkDerivation {
   pname = "wlay";
   version = "unstable-2022-01-26";
 
@@ -54,4 +54,4 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with lib.maintainers; [ AndersonTorres ];
     inherit (wayland.meta) platforms;
   };
-})
+}