diff --git a/modules/age.nix b/modules/age.nix
index a4631f7..1b8d0bf 100644
--- a/modules/age.nix
+++ b/modules/age.nix
@@ -1,14 +1,17 @@
-{ config, options, lib, pkgs, ... }:
-
-with lib;
-
-let
+{
+  config,
+  options,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
   cfg = config.age;
 
   # we need at least rage 0.5.0 to support ssh keys
   rage =
     if lib.versionOlder pkgs.rage.version "0.5.0"
-    then pkgs.callPackage ../pkgs/rage.nix { }
+    then pkgs.callPackage ../pkgs/rage.nix {}
     else pkgs.rage;
   ageBin = config.age.ageBin;
 
@@ -28,11 +31,15 @@ let
   identities = builtins.concatStringsSep " " (map (path: "-i ${path}") cfg.identityPaths);
 
   setTruePath = secretType: ''
-    ${if secretType.symlink then ''
-      _truePath="${cfg.secretsMountPoint}/$_agenix_generation/${secretType.name}"
-    '' else ''
-      _truePath="${secretType.path}"
-    ''}
+    ${
+      if secretType.symlink
+      then ''
+        _truePath="${cfg.secretsMountPoint}/$_agenix_generation/${secretType.name}"
+      ''
+      else ''
+        _truePath="${secretType.path}"
+      ''
+    }
   '';
 
   installSecret = secretType: ''
@@ -55,9 +62,11 @@ let
     ''}
   '';
 
-  testIdentities = map (path: ''
-    test -f ${path} || echo '[agenix] WARNING: config.age.identityPaths entry ${path} not present!'
-  '') cfg.identityPaths;
+  testIdentities =
+    map (path: ''
+      test -f ${path} || echo '[agenix] WARNING: config.age.identityPaths entry ${path} not present!'
+    '')
+    cfg.identityPaths;
 
   cleanupAndLink = ''
     _agenix_generation="$(basename "$(readlink ${cfg.secretsDir})" || echo 0)"
@@ -72,10 +81,10 @@ let
   '';
 
   installSecrets = builtins.concatStringsSep "\n" (
-    [ "echo '[agenix] decrypting secrets...'" ]
+    ["echo '[agenix] decrypting secrets...'"]
     ++ testIdentities
     ++ (map installSecret (builtins.attrValues cfg.secrets))
-    ++ [ cleanupAndLink ]
+    ++ [cleanupAndLink]
   );
 
   chownSecret = secretType: ''
@@ -90,11 +99,12 @@ let
   '';
 
   chownSecrets = builtins.concatStringsSep "\n" (
-    [ "echo '[agenix] chowning...'" ]
-    ++ [ chownMountPoint ]
-    ++ (map chownSecret (builtins.attrValues cfg.secrets)));
+    ["echo '[agenix] chowning...'"]
+    ++ [chownMountPoint]
+    ++ (map chownSecret (builtins.attrValues cfg.secrets))
+  );
 
-  secretType = types.submodule ({ config, ... }: {
+  secretType = types.submodule ({config, ...}: {
     options = {
       name = mkOption {
         type = types.str;
@@ -137,14 +147,12 @@ let
           Group of the decrypted secret.
         '';
       };
-      symlink = mkEnableOption "symlinking secrets to their destination" // { default = true; };
+      symlink = mkEnableOption "symlinking secrets to their destination" // {default = true;};
     };
   });
-in
-{
-
+in {
   imports = [
-    (mkRenamedOptionModule [ "age" "sshKeyPaths" ] [ "age" "identityPaths" ])
+    (mkRenamedOptionModule ["age" "sshKeyPaths"] ["age" "identityPaths"])
   ];
 
   options.age = {
@@ -157,7 +165,7 @@ in
     };
     secrets = mkOption {
       type = types.attrsOf secretType;
-      default = { };
+      default = {};
       description = ''
         Attrset of secrets.
       '';
@@ -170,11 +178,13 @@ in
       '';
     };
     secretsMountPoint = mkOption {
-      type = types.addCheck types.str
+      type =
+        types.addCheck types.str
         (s:
-          (builtins.match "[ \t\n]*" s) == null # non-empty
-            && (builtins.match ".+/" s) == null) # without trailing slash
-      // { description = "${types.str.description} (with check: non-empty without trailing slash)"; };
+          (builtins.match "[ \t\n]*" s)
+          == null # non-empty
+          && (builtins.match ".+/" s) == null) # without trailing slash
+        // {description = "${types.str.description} (with check: non-empty without trailing slash)";};
       default = "/run/agenix.d";
       defaultText = "/run/agenix.d";
       description = ''
@@ -184,20 +194,22 @@ in
     identityPaths = mkOption {
       type = types.listOf types.path;
       default =
-        if config.services.openssh.enable then
-          map (e: e.path) (lib.filter (e: e.type == "rsa" || e.type == "ed25519") config.services.openssh.hostKeys)
-        else [ ];
+        if config.services.openssh.enable
+        then map (e: e.path) (lib.filter (e: e.type == "rsa" || e.type == "ed25519") config.services.openssh.hostKeys)
+        else [];
       description = ''
         Path to SSH keys to be used as identities in age decryption.
       '';
     };
   };
 
-  config = mkIf (cfg.secrets != { }) {
-    assertions = [{
-      assertion = cfg.identityPaths != [ ];
-      message = "age.identityPaths must be set.";
-    }];
+  config = mkIf (cfg.secrets != {}) {
+    assertions = [
+      {
+        assertion = cfg.identityPaths != [];
+        message = "age.identityPaths must be set.";
+      }
+    ];
 
     # Create a new directory full of secrets for symlinking (this helps
     # ensure removed secrets are actually removed, or at least become
@@ -218,7 +230,7 @@ in
     };
 
     # So user passwords can be encrypted.
-    system.activationScripts.users.deps = [ "agenixInstall" ];
+    system.activationScripts.users.deps = ["agenixInstall"];
 
     # Change ownership and group after users and groups are made.
     system.activationScripts.agenixChown = {
@@ -232,8 +244,7 @@ in
     # So other activation scripts can depend on agenix being done.
     system.activationScripts.agenix = {
       text = "";
-      deps = [ "agenixChown"];
+      deps = ["agenixChown"];
     };
   };
-
 }
diff --git a/overlay.nix b/overlay.nix
index de0e8a6..f484e44 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -1,4 +1,3 @@
-final: prev:
-{
-  agenix = prev.callPackage ./pkgs/agenix.nix { };
+final: prev: {
+  agenix = prev.callPackage ./pkgs/agenix.nix {};
 }
diff --git a/pkgs/agenix.nix b/pkgs/agenix.nix
index e62861a..56e3da3 100644
--- a/pkgs/agenix.nix
+++ b/pkgs/agenix.nix
@@ -13,177 +13,175 @@
     if rage.version < "0.5.0"
     then callPackage ./rage.nix {}
     else rage
-  }/bin/rage"
-} :
-let
+  }/bin/rage",
+}: let
   sedBin = "${gnused}/bin/sed";
   nixInstantiate = "${nix}/bin/nix-instantiate";
   mktempBin = "${mktemp}/bin/mktemp";
   diffBin = "${diffutils}/bin/diff";
 in
-lib.recursiveUpdate (writeShellScriptBin "agenix" ''
-set -Eeuo pipefail
+  lib.recursiveUpdate (writeShellScriptBin "agenix" ''
+    set -Eeuo pipefail
 
-PACKAGE="agenix"
+    PACKAGE="agenix"
 
-function show_help () {
-  echo "$PACKAGE - edit and rekey age secret files"
-  echo " "
-  echo "$PACKAGE -e FILE [-i PRIVATE_KEY]"
-  echo "$PACKAGE -r [-i PRIVATE_KEY]"
-  echo ' '
-  echo 'options:'
-  echo '-h, --help                show help'
-  echo '-e, --edit FILE           edits FILE using $EDITOR'
-  echo '-r, --rekey               re-encrypts all secrets with specified recipients'
-  echo '-i, --identity            identity to use when decrypting'
-  echo '-v, --verbose             verbose output'
-  echo ' '
-  echo 'FILE an age-encrypted file'
-  echo ' '
-  echo 'PRIVATE_KEY a path to a private SSH key used to decrypt file'
-  echo ' '
-  echo 'EDITOR environment variable of editor to use when editing FILE'
-  echo ' '
-  echo 'RULES environment variable with path to Nix file specifying recipient public keys.'
-  echo "Defaults to './secrets.nix'"
-  echo ' '
-  echo "agenix version: 0.13.0"
-  echo "age binary path: ${ageBin}"
-  echo "age version: $(${ageBin} --version)"
-}
+    function show_help () {
+      echo "$PACKAGE - edit and rekey age secret files"
+      echo " "
+      echo "$PACKAGE -e FILE [-i PRIVATE_KEY]"
+      echo "$PACKAGE -r [-i PRIVATE_KEY]"
+      echo ' '
+      echo 'options:'
+      echo '-h, --help                show help'
+      echo '-e, --edit FILE           edits FILE using $EDITOR'
+      echo '-r, --rekey               re-encrypts all secrets with specified recipients'
+      echo '-i, --identity            identity to use when decrypting'
+      echo '-v, --verbose             verbose output'
+      echo ' '
+      echo 'FILE an age-encrypted file'
+      echo ' '
+      echo 'PRIVATE_KEY a path to a private SSH key used to decrypt file'
+      echo ' '
+      echo 'EDITOR environment variable of editor to use when editing FILE'
+      echo ' '
+      echo 'RULES environment variable with path to Nix file specifying recipient public keys.'
+      echo "Defaults to './secrets.nix'"
+      echo ' '
+      echo "agenix version: 0.13.0"
+      echo "age binary path: ${ageBin}"
+      echo "age version: $(${ageBin} --version)"
+    }
 
-test $# -eq 0 && (show_help && exit 1)
+    test $# -eq 0 && (show_help && exit 1)
 
-REKEY=0
-DEFAULT_DECRYPT=(--decrypt)
+    REKEY=0
+    DEFAULT_DECRYPT=(--decrypt)
 
-while test $# -gt 0; do
-  case "$1" in
-    -h|--help)
-      show_help
-      exit 0
-      ;;
-    -e|--edit)
-      shift
-      if test $# -gt 0; then
-        export FILE=$1
-      else
-        echo "no FILE specified"
-        exit 1
-      fi
-      shift
-      ;;
-    -i|--identity)
-      shift
-      if test $# -gt 0; then
-        DEFAULT_DECRYPT+=(--identity "$1")
-      else
-        echo "no PRIVATE_KEY specified"
-        exit 1
-      fi
-      shift
-      ;;
-    -r|--rekey)
-      shift
-      REKEY=1
-      ;;
-    -v|--verbose)
-      shift
-      set -x
-      ;;
-    *)
-      show_help
-      exit 1
-      ;;
-  esac
-done
-
-RULES=''${RULES:-./secrets.nix}
-
-function cleanup {
-    if [ ! -z ''${CLEARTEXT_DIR+x} ]
-    then
-        rm -rf "$CLEARTEXT_DIR"
-    fi
-    if [ ! -z ''${REENCRYPTED_DIR+x} ]
-    then
-        rm -rf "$REENCRYPTED_DIR"
-    fi
-}
-trap "cleanup" 0 2 3 15
-
-function edit {
-    FILE=$1
-    KEYS=$((${nixInstantiate} --eval -E "(let rules = import $RULES; in builtins.concatStringsSep \"\n\" rules.\"$FILE\".publicKeys)" | ${sedBin} 's/"//g' | ${sedBin} 's/\\n/\n/g') | ${sedBin} '/^$/d' || exit 1)
-
-    if [ -z "$KEYS" ]
-    then
-        >&2 echo "There is no rule for $FILE in $RULES."
-        exit 1
-    fi
-
-    CLEARTEXT_DIR=$(${mktempBin} -d)
-    CLEARTEXT_FILE="$CLEARTEXT_DIR/$(basename "$FILE")"
-
-    if [ -f "$FILE" ]
-    then
-        DECRYPT=("''${DEFAULT_DECRYPT[@]}")
-        if [ -f "$HOME/.ssh/id_rsa" ]; then
-            DECRYPT+=(--identity "$HOME/.ssh/id_rsa")
-        fi
-        if [ -f "$HOME/.ssh/id_ed25519" ]; then
-            DECRYPT+=(--identity "$HOME/.ssh/id_ed25519")
-        fi
-        if [[ "''${DECRYPT[*]}" != *"--identity"* ]]; then
-          echo "No identity found to decrypt $FILE. Try adding an SSH key at $HOME/.ssh/id_rsa or $HOME/.ssh/id_ed25519 or using the --identity flag to specify a file."
+    while test $# -gt 0; do
+      case "$1" in
+        -h|--help)
+          show_help
+          exit 0
+          ;;
+        -e|--edit)
+          shift
+          if test $# -gt 0; then
+            export FILE=$1
+          else
+            echo "no FILE specified"
+            exit 1
+          fi
+          shift
+          ;;
+        -i|--identity)
+          shift
+          if test $# -gt 0; then
+            DEFAULT_DECRYPT+=(--identity "$1")
+          else
+            echo "no PRIVATE_KEY specified"
+            exit 1
+          fi
+          shift
+          ;;
+        -r|--rekey)
+          shift
+          REKEY=1
+          ;;
+        -v|--verbose)
+          shift
+          set -x
+          ;;
+        *)
+          show_help
           exit 1
-        fi
-        DECRYPT+=(-o "$CLEARTEXT_FILE" "$FILE")
-        ${ageBin} "''${DECRYPT[@]}" || exit 1
-        cp "$CLEARTEXT_FILE" "$CLEARTEXT_FILE.before"
-    fi
-
-    $EDITOR "$CLEARTEXT_FILE"
-
-    if [ ! -f "$CLEARTEXT_FILE" ]
-    then
-      echo "$FILE wasn't created."
-      return
-    fi
-    [ -f "$FILE" ] && [ "$EDITOR" != ":" ] && ${diffBin} "$CLEARTEXT_FILE.before" "$CLEARTEXT_FILE" 1>/dev/null && echo "$FILE wasn't changed, skipping re-encryption." && return
-
-    ENCRYPT=()
-    while IFS= read -r key
-    do
-        ENCRYPT+=(--recipient "$key")
-    done <<< "$KEYS"
-
-    REENCRYPTED_DIR=$(${mktempBin} -d)
-    REENCRYPTED_FILE="$REENCRYPTED_DIR/$(basename "$FILE")"
-
-    ENCRYPT+=(-o "$REENCRYPTED_FILE")
-
-    ${ageBin} "''${ENCRYPT[@]}" <"$CLEARTEXT_FILE" || exit 1
-
-    mv -f "$REENCRYPTED_FILE" "$1"
-}
-
-function rekey {
-    FILES=$((${nixInstantiate} --eval -E "(let rules = import $RULES; in builtins.concatStringsSep \"\n\" (builtins.attrNames rules))"  | ${sedBin} 's/"//g' | ${sedBin} 's/\\n/\n/g') || exit 1)
-
-    for FILE in $FILES
-    do
-        echo "rekeying $FILE..."
-        EDITOR=: edit "$FILE"
-        cleanup
+          ;;
+      esac
     done
-}
 
-[ $REKEY -eq 1 ] && rekey && exit 0
-edit "$FILE" && cleanup && exit 0
-'')
+    RULES=''${RULES:-./secrets.nix}
 
-{
-  meta.description = "age-encrypted secrets for NixOS";
-}
+    function cleanup {
+        if [ ! -z ''${CLEARTEXT_DIR+x} ]
+        then
+            rm -rf "$CLEARTEXT_DIR"
+        fi
+        if [ ! -z ''${REENCRYPTED_DIR+x} ]
+        then
+            rm -rf "$REENCRYPTED_DIR"
+        fi
+    }
+    trap "cleanup" 0 2 3 15
+
+    function edit {
+        FILE=$1
+        KEYS=$((${nixInstantiate} --eval -E "(let rules = import $RULES; in builtins.concatStringsSep \"\n\" rules.\"$FILE\".publicKeys)" | ${sedBin} 's/"//g' | ${sedBin} 's/\\n/\n/g') | ${sedBin} '/^$/d' || exit 1)
+
+        if [ -z "$KEYS" ]
+        then
+            >&2 echo "There is no rule for $FILE in $RULES."
+            exit 1
+        fi
+
+        CLEARTEXT_DIR=$(${mktempBin} -d)
+        CLEARTEXT_FILE="$CLEARTEXT_DIR/$(basename "$FILE")"
+
+        if [ -f "$FILE" ]
+        then
+            DECRYPT=("''${DEFAULT_DECRYPT[@]}")
+            if [ -f "$HOME/.ssh/id_rsa" ]; then
+                DECRYPT+=(--identity "$HOME/.ssh/id_rsa")
+            fi
+            if [ -f "$HOME/.ssh/id_ed25519" ]; then
+                DECRYPT+=(--identity "$HOME/.ssh/id_ed25519")
+            fi
+            if [[ "''${DECRYPT[*]}" != *"--identity"* ]]; then
+              echo "No identity found to decrypt $FILE. Try adding an SSH key at $HOME/.ssh/id_rsa or $HOME/.ssh/id_ed25519 or using the --identity flag to specify a file."
+              exit 1
+            fi
+            DECRYPT+=(-o "$CLEARTEXT_FILE" "$FILE")
+            ${ageBin} "''${DECRYPT[@]}" || exit 1
+            cp "$CLEARTEXT_FILE" "$CLEARTEXT_FILE.before"
+        fi
+
+        $EDITOR "$CLEARTEXT_FILE"
+
+        if [ ! -f "$CLEARTEXT_FILE" ]
+        then
+          echo "$FILE wasn't created."
+          return
+        fi
+        [ -f "$FILE" ] && [ "$EDITOR" != ":" ] && ${diffBin} "$CLEARTEXT_FILE.before" "$CLEARTEXT_FILE" 1>/dev/null && echo "$FILE wasn't changed, skipping re-encryption." && return
+
+        ENCRYPT=()
+        while IFS= read -r key
+        do
+            ENCRYPT+=(--recipient "$key")
+        done <<< "$KEYS"
+
+        REENCRYPTED_DIR=$(${mktempBin} -d)
+        REENCRYPTED_FILE="$REENCRYPTED_DIR/$(basename "$FILE")"
+
+        ENCRYPT+=(-o "$REENCRYPTED_FILE")
+
+        ${ageBin} "''${ENCRYPT[@]}" <"$CLEARTEXT_FILE" || exit 1
+
+        mv -f "$REENCRYPTED_FILE" "$1"
+    }
+
+    function rekey {
+        FILES=$((${nixInstantiate} --eval -E "(let rules = import $RULES; in builtins.concatStringsSep \"\n\" (builtins.attrNames rules))"  | ${sedBin} 's/"//g' | ${sedBin} 's/\\n/\n/g') || exit 1)
+
+        for FILE in $FILES
+        do
+            echo "rekeying $FILE..."
+            EDITOR=: edit "$FILE"
+            cleanup
+        done
+    }
+
+    [ $REKEY -eq 1 ] && rekey && exit 0
+    edit "$FILE" && cleanup && exit 0
+  '')
+  {
+    meta.description = "age-encrypted secrets for NixOS";
+  }
diff --git a/pkgs/rage.nix b/pkgs/rage.nix
index 8db697d..4db11e9 100644
--- a/pkgs/rage.nix
+++ b/pkgs/rage.nix
@@ -1,5 +1,10 @@
-{ stdenv, rustPlatform, fetchFromGitHub, installShellFiles, darwin }:
-
+{
+  stdenv,
+  rustPlatform,
+  fetchFromGitHub,
+  installShellFiles,
+  darwin,
+}:
 rustPlatform.buildRustPackage rec {
   pname = "rage";
   version = "0.5.0";
@@ -13,12 +18,13 @@ rustPlatform.buildRustPackage rec {
 
   cargoSha256 = "sha256-GPr5zxeODAjD+ynp/nned9gZUiReYcdzosuEbLIKZSs=";
 
-  nativeBuildInputs = [ installShellFiles ];
+  nativeBuildInputs = [installShellFiles];
 
-  buildInputs = with darwin.apple_sdk.frameworks; stdenv.lib.optionals stdenv.isDarwin [
-    Security
-    Foundation
-  ];
+  buildInputs = with darwin.apple_sdk.frameworks;
+    stdenv.lib.optionals stdenv.isDarwin [
+      Security
+      Foundation
+    ];
 
   # cargo test has an x86-only dependency
   doCheck = stdenv.hostPlatform.isx86;
@@ -37,7 +43,7 @@ rustPlatform.buildRustPackage rec {
     description = "A simple, secure and modern encryption tool with small explicit keys, no config options, and UNIX-style composability";
     homepage = "https://github.com/str4d/rage";
     changelog = "https://github.com/str4d/rage/releases/tag/v${version}";
-    license = with licenses; [ asl20 mit ]; # either at your option
-    maintainers = with maintainers; [ marsam ryantm ];
+    license = with licenses; [asl20 mit]; # either at your option
+    maintainers = with maintainers; [marsam ryantm];
   };
 }
diff --git a/test/install_ssh_host_keys.nix b/test/install_ssh_host_keys.nix
index 93f383d..b431173 100644
--- a/test/install_ssh_host_keys.nix
+++ b/test/install_ssh_host_keys.nix
@@ -1,6 +1,6 @@
 # Do not copy this! It is insecure. This is only okay because we are testing.
 {
-  system.activationScripts.agenixInstall.deps = [ "installSSHHostKeys" ];
+  system.activationScripts.agenixInstall.deps = ["installSSHHostKeys"];
 
   system.activationScripts.installSSHHostKeys.text = ''
     mkdir -p /etc/ssh
diff --git a/test/integration.nix b/test/integration.nix
index 90f8b8b..01d8e3a 100644
--- a/test/integration.nix
+++ b/test/integration.nix
@@ -1,14 +1,20 @@
 {
-nixpkgs ? <nixpkgs>,
-pkgs ? import <nixpkgs> { inherit system; config = {}; },
-system ? builtins.currentSystem
-} @args:
-
-import "${nixpkgs}/nixos/tests/make-test-python.nix" ({ pkgs, ...}: {
+  nixpkgs ? <nixpkgs>,
+  pkgs ?
+    import <nixpkgs> {
+      inherit system;
+      config = {};
+    },
+  system ? builtins.currentSystem,
+} @ args:
+import "${nixpkgs}/nixos/tests/make-test-python.nix" ({pkgs, ...}: {
   name = "agenix-integration";
 
-  nodes.system1 = { config, lib, ... }: {
-
+  nodes.system1 = {
+    config,
+    lib,
+    ...
+  }: {
     imports = [
       ../modules/age.nix
       ./install_ssh_host_keys.nix
@@ -30,11 +36,9 @@ import "${nixpkgs}/nixos/tests/make-test-python.nix" ({ pkgs, ...}: {
         };
       };
     };
-
   };
 
-  testScript =
-  let
+  testScript = let
     user = "user1";
     password = "password1234";
   in ''
@@ -55,4 +59,5 @@ import "${nixpkgs}/nixos/tests/make-test-python.nix" ({ pkgs, ...}: {
     system1.wait_for_file("/tmp/1")
     assert "${user}" in system1.succeed("cat /tmp/1")
   '';
-}) args
+})
+args