diff --git a/flake.nix b/flake.nix
index 81ec93b..aa15219 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,7 +26,7 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
-  outputs = { self, nixpkgs, nixos-hardware, chaosevents, fernglas, nixos-exporter, solid-xmpp-alarm, ... }@inputs: let
+  outputs = { self, agenix, nixpkgs, nixos-hardware, chaosevents, fernglas, nixos-exporter, solid-xmpp-alarm, ... }@inputs: let
     helper = (import ./lib/flake-helper.nix) inputs;
   in {
     clerie.hosts = {
@@ -86,6 +86,12 @@
       pkgs = import nixpkgs {
         overlays = [
           (import ./pkgs/overlay.nix)
+          (_: _: {
+            inherit (agenix.packages."x86_64-linux")
+              agenix;
+            inherit (chaosevents.packages."x86_64-linux")
+              chaosevents;
+           })
         ];
         system = "x86_64-linux";
       };
@@ -94,7 +100,10 @@
         anycast_healthchecker
         flask-excel
         iot-data
+        nixfiles-add-secret
+        nixfiles-generate-backup-secrets
         nixfiles-updated-inputs
+        nixfiles-update-ssh-host-keys
         pyexcel-xlsx
         pyexcel-webio
         uptimestatus
diff --git a/pkgs/nixfiles/nixfiles-add-secret.nix b/pkgs/nixfiles/nixfiles-add-secret.nix
new file mode 100644
index 0000000..05cc0e5
--- /dev/null
+++ b/pkgs/nixfiles/nixfiles-add-secret.nix
@@ -0,0 +1,11 @@
+{ pkgs, ... }:
+
+pkgs.writeShellApplication {
+  name = "nixfiles-add-secret";
+  text = builtins.readFile ./nixfiles-add-secret.sh;
+  runtimeInputs = with pkgs; [
+    agenix
+    git
+  ];
+}
+
diff --git a/pkgs/nixfiles/nixfiles-add-secret.sh b/pkgs/nixfiles/nixfiles-add-secret.sh
index 31d2991..e6345e0 100755
--- a/pkgs/nixfiles/nixfiles-add-secret.sh
+++ b/pkgs/nixfiles/nixfiles-add-secret.sh
@@ -1,15 +1,15 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 
-cd $(git rev-parse --show-toplevel)
+cd "$(git rev-parse --show-toplevel)"
 
-host=$1
-secret=$2
+host="$1"
+secret="$2"
 
-mkdir -p hosts/${host}/secrets
+mkdir -p "hosts/${host}/secrets"
 
-nix run github:ryantm/agenix -- -e hosts/${host}/secrets/new
+agenix -e "hosts/${host}/secrets/new"
 
-mv hosts/${host}/secrets/new hosts/${host}/secrets/${secret}.age
+mv "hosts/${host}/secrets/new" "hosts/${host}/secrets/${secret}.age"
 
diff --git a/pkgs/nixfiles/nixfiles-generate-backup-secrets.nix b/pkgs/nixfiles/nixfiles-generate-backup-secrets.nix
new file mode 100644
index 0000000..9c2885e
--- /dev/null
+++ b/pkgs/nixfiles/nixfiles-generate-backup-secrets.nix
@@ -0,0 +1,13 @@
+{ pkgs, ... }:
+
+pkgs.writeShellApplication {
+  name = "nixfiles-generate-backup-secrets";
+  text = builtins.readFile ./nixfiles-generate-backup-secrets.sh;
+  runtimeInputs = with pkgs; [
+    agenix
+    apacheHttpd
+    git
+    pwgen
+  ];
+}
+
diff --git a/pkgs/nixfiles/nixfiles-generate-backup-secrets.sh b/pkgs/nixfiles/nixfiles-generate-backup-secrets.sh
index f09af98..28dcb42 100755
--- a/pkgs/nixfiles/nixfiles-generate-backup-secrets.sh
+++ b/pkgs/nixfiles/nixfiles-generate-backup-secrets.sh
@@ -1,32 +1,32 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 
-cd $(git rev-parse --show-toplevel)
+cd "$(git rev-parse --show-toplevel)"
 
-host=$1
+host="$1"
 
-job_main=$(nix run nixpkgs#pwgen -- -1 64 1)
-target_cyan=$(nix run nixpkgs#pwgen -- -1 64 1)
-target_cyan_htpasswd=$(nix shell nixpkgs#apacheHttpd -c htpasswd -nbB ${host} ${target_cyan})
-target_magenta=$(nix run nixpkgs#pwgen -- -1 64 1)
-target_magenta_htpasswd=$(nix shell nixpkgs#apacheHttpd -c htpasswd -nbB ${host} ${target_magenta})
+job_main="$(pwgen -1 64 1)"
+target_cyan="$(pwgen -1 64 1)"
+target_cyan_htpasswd="$(htpasswd -nbB "${host}" "${target_cyan}")"
+target_magenta="$(pwgen -1 64 1)"
+target_magenta_htpasswd="$(htpasswd -nbB "${host}" "${target_magenta}")"
 
-mkdir -p hosts/${host}/secrets
+mkdir -p "hosts/${host}/secrets"
 
-echo "$job_main" | nix run github:ryantm/agenix -- -e hosts/${host}/secrets/new
-mv hosts/${host}/secrets/new hosts/${host}/secrets/clerie-backup-job-main.age
+echo "$job_main" | agenix -e "hosts/${host}/secrets/new"
+mv "hosts/${host}/secrets/new" "hosts/${host}/secrets/clerie-backup-job-main.age"
 
-echo "$target_cyan" | nix run github:ryantm/agenix -- -e hosts/${host}/secrets/new
-mv hosts/${host}/secrets/new hosts/${host}/secrets/clerie-backup-target-cyan.age
+echo "$target_cyan" | agenix -e "hosts/${host}/secrets/new"
+mv "hosts/${host}/secrets/new" "hosts/${host}/secrets/clerie-backup-target-cyan.age"
 
-echo "$target_magenta" | nix run github:ryantm/agenix -- -e hosts/${host}/secrets/new
-mv hosts/${host}/secrets/new hosts/${host}/secrets/clerie-backup-target-magenta.age
+echo "$target_magenta" | agenix -e "hosts/${host}/secrets/new"
+mv "hosts/${host}/secrets/new" "hosts/${host}/secrets/clerie-backup-target-magenta.age"
 
-prev_htpasswd_cyan=$(nix run github:ryantm/agenix -- -d hosts/clerie-backup/secrets/restic-server-cyan-htpasswd.age)
-cat <(echo "$prev_htpasswd_cyan") <(echo "$target_cyan_htpasswd") | nix run github:ryantm/agenix -- -e hosts/clerie-backup/secrets/new
-mv hosts/clerie-backup/secrets/new hosts/clerie-backup/secrets/restic-server-cyan-htpasswd.age
+prev_htpasswd_cyan="$(agenix -d hosts/clerie-backup/secrets/restic-server-cyan-htpasswd.age)"
+cat <(echo "$prev_htpasswd_cyan") <(echo "$target_cyan_htpasswd") | agenix -e "hosts/clerie-backup/secrets/new"
+mv "hosts/clerie-backup/secrets/new" "hosts/clerie-backup/secrets/restic-server-cyan-htpasswd.age"
 
-prev_htpasswd_magenta=$(nix run github:ryantm/agenix -- -d hosts/backup-4/secrets/restic-server-magenta-htpasswd.age)
-cat <(echo "$prev_htpasswd_magenta") <(echo "$target_magenta_htpasswd") | nix run github:ryantm/agenix -- -e hosts/backup-4/secrets/new
-mv hosts/backup-4/secrets/new hosts/backup-4/secrets/restic-server-magenta-htpasswd.age
+prev_htpasswd_magenta="$(agenix -d "hosts/backup-4/secrets/restic-server-magenta-htpasswd.age")"
+cat <(echo "$prev_htpasswd_magenta") <(echo "$target_magenta_htpasswd") | agenix -e "hosts/backup-4/secrets/new"
+mv "hosts/backup-4/secrets/new" "hosts/backup-4/secrets/restic-server-magenta-htpasswd.age"
diff --git a/pkgs/nixfiles/nixfiles-update-ssh-host-keys.nix b/pkgs/nixfiles/nixfiles-update-ssh-host-keys.nix
new file mode 100644
index 0000000..960763b
--- /dev/null
+++ b/pkgs/nixfiles/nixfiles-update-ssh-host-keys.nix
@@ -0,0 +1,12 @@
+{ pkgs, ... }:
+
+pkgs.writeShellApplication {
+  name = "nixfiles-update-ssh-host-keys";
+  text = builtins.readFile ./nixfiles-update-ssh-host-keys.sh;
+  runtimeInputs = with pkgs; [
+    git
+    nix
+    openssh
+  ];
+}
+
diff --git a/pkgs/nixfiles/nixfiles-update-ssh-host-keys.sh b/pkgs/nixfiles/nixfiles-update-ssh-host-keys.sh
index 33ab4a3..e1298f4 100755
--- a/pkgs/nixfiles/nixfiles-update-ssh-host-keys.sh
+++ b/pkgs/nixfiles/nixfiles-update-ssh-host-keys.sh
@@ -1,8 +1,8 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-cd $(git rev-parse --show-toplevel)
+cd "$(git rev-parse --show-toplevel)"
 
 for host in $(nix eval --apply 'attrs: builtins.concatStringsSep "\n" (builtins.filter (name: (builtins.substring 0 1 name) != "_") (builtins.attrNames attrs))' --raw .#clerie.hosts); do
-	echo $host
-	ssh-keyscan -t ed25519 ${host}.net.clerie.de 2>/dev/null | sed -E 's/(\S+) (.+)/\2/g' > hosts/${host}/ssh.pub
+	echo "$host"
+	ssh-keyscan -t ed25519 "${host}.net.clerie.de" 2>/dev/null | sed -E 's/(\S+) (.+)/\2/g' > "hosts/${host}/ssh.pub"
 done
diff --git a/pkgs/nixfiles/default.nix b/pkgs/nixfiles/nixfiles-updated-inputs.nix
similarity index 100%
rename from pkgs/nixfiles/default.nix
rename to pkgs/nixfiles/nixfiles-updated-inputs.nix
diff --git a/pkgs/overlay.nix b/pkgs/overlay.nix
index b4514a6..6bcabf7 100644
--- a/pkgs/overlay.nix
+++ b/pkgs/overlay.nix
@@ -2,7 +2,10 @@ self: super: {
   anycast_healthchecker = self.python3.pkgs.callPackage ./anycast_healthchecker {};
   flask-excel = self.python3.pkgs.callPackage ./flask-excel {};
   iot-data = self.python3.pkgs.callPackage ./iot-data {};
-  nixfiles-updated-inputs = self.callPackage ./nixfiles {};
+  nixfiles-add-secret = self.callPackage ./nixfiles/nixfiles-add-secret.nix {};
+  nixfiles-generate-backup-secrets = self.callPackage ./nixfiles/nixfiles-generate-backup-secrets.nix {};
+  nixfiles-updated-inputs = self.callPackage ./nixfiles/nixfiles-updated-inputs.nix {};
+  nixfiles-update-ssh-host-keys = self.callPackage ./nixfiles/nixfiles-update-ssh-host-keys.nix {};
   pyexcel-xlsx = self.python3.pkgs.callPackage ./pyexcel-xlsx {};
   pyexcel-webio = self.python3.pkgs.callPackage ./pyexcel-webio {};
   uptimestatus = self.python3.pkgs.callPackage ./uptimestatus {};