diff --git a/pkgs/by-name/gr/gren/update.sh b/pkgs/by-name/gr/gren/update.sh
index 9ebc456179cc3..386884c233e36 100755
--- a/pkgs/by-name/gr/gren/update.sh
+++ b/pkgs/by-name/gr/gren/update.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p cabal2nix curl jq nix-update nixfmt
+#!nix-shell -i bash -p cabal2nix curl jq nix-update
 
 set -euo pipefail
 
diff --git a/pkgs/by-name/mu/music-assistant/update-providers.py b/pkgs/by-name/mu/music-assistant/update-providers.py
index fb1825fdc2332..393dbca9500a3 100755
--- a/pkgs/by-name/mu/music-assistant/update-providers.py
+++ b/pkgs/by-name/mu/music-assistant/update-providers.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -I nixpkgs=./. -i python3 -p "music-assistant.python.withPackages (ps: music-assistant.dependencies ++ (with ps; [ jinja2 packaging ]))" -p nixfmt pyright ruff isort
+#!nix-shell -I nixpkgs=./. -i python3 -p "music-assistant.python.withPackages (ps: music-assistant.dependencies ++ (with ps; [ jinja2 packaging ]))" -p pyright ruff isort
 import asyncio
 import json
 import os.path
diff --git a/pkgs/development/compilers/dotnet/update.sh b/pkgs/development/compilers/dotnet/update.sh
index 46486f9e309a6..8dd35a3bc0bbd 100755
--- a/pkgs/development/compilers/dotnet/update.sh
+++ b/pkgs/development/compilers/dotnet/update.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -I nixpkgs=./. -i bash -p curl jq nix gnused nixfmt
+#!nix-shell -I nixpkgs=./. -i bash -p curl jq nix gnused
 # shellcheck shell=bash
 
 set -Eeuo pipefail
diff --git a/pkgs/os-specific/linux/kernel/update-xanmod.sh b/pkgs/os-specific/linux/kernel/update-xanmod.sh
index 2e1d9724db2d1..ecf458c8bb46c 100755
--- a/pkgs/os-specific/linux/kernel/update-xanmod.sh
+++ b/pkgs/os-specific/linux/kernel/update-xanmod.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p bash nix-prefetch curl jq gawk gnused nixfmt
+#!nix-shell -i bash -p bash nix-prefetch curl jq gawk gnused
 
 set -euo pipefail
 
diff --git a/pkgs/servers/home-assistant/update-component-packages.py b/pkgs/servers/home-assistant/update-component-packages.py
index 471e576a61507..a30117184c9e0 100755
--- a/pkgs/servers/home-assistant/update-component-packages.py
+++ b/pkgs/servers/home-assistant/update-component-packages.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env nix-shell
-#! nix-shell -i python3 -p "python3.withPackages (ps: with ps; [ packaging rich ])" -p pyright ruff isort nixfmt
+#! nix-shell -i python3 -p "python3.withPackages (ps: with ps; [ packaging rich ])" -p pyright ruff isort
 #
 # This script downloads Home Assistant's source tarball.
 # Inside the homeassistant/components directory, each integration has an associated manifest.json,
diff --git a/pkgs/servers/x11/xorg/update.py b/pkgs/servers/x11/xorg/update.py
index 65a2fe190a17c..7aa9fe44db4e8 100755
--- a/pkgs/servers/x11/xorg/update.py
+++ b/pkgs/servers/x11/xorg/update.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell --pure --keep NIX_PATH -i python3 -p nix git nixfmt "python3.withPackages (ps: [ ps. packaging ps.beautifulsoup4 ps.requests ])"
+#!nix-shell -i python3 -p nix git "python3.withPackages (ps: [ ps. packaging ps.beautifulsoup4 ps.requests ])"
 
 # Usage: Run ./update.py from the directory containing tarballs.list. The script checks for the
 # latest versions of all packages, updates the expressions if any update is found, and commits