diff --git a/pkgs/servers/asterisk/default.nix b/pkgs/servers/asterisk/default.nix
index b8e856b24164..c80c747b50c6 100644
--- a/pkgs/servers/asterisk/default.nix
+++ b/pkgs/servers/asterisk/default.nix
@@ -1,12 +1,38 @@
-{ stdenv, lib, fetchurl, fetchsvn, fetchFromGitHub,
-  jansson, libedit, libxml2, libxslt, ncurses, openssl, sqlite,
-  util-linux, dmidecode, libuuid, newt,
-  lua, speex, libopus, opusfile, libogg,
-  srtp, wget, curl, iksemel, pkg-config,
-  autoconf, libtool, automake, fetchpatch,
-  python39, writeScript,
-  withOpus ? true,
-  ldapSupport ? false, openldap
+{ stdenv
+, lib
+, fetchurl
+, fetchsvn
+, fetchFromGitHub
+, jansson
+, libedit
+, libxml2
+, libxslt
+, ncurses
+, openssl
+, sqlite
+, util-linux
+, dmidecode
+, libuuid
+, newt
+, lua
+, speex
+, libopus
+, opusfile
+, libogg
+, srtp
+, wget
+, curl
+, iksemel
+, pkg-config
+, autoconf
+, libtool
+, automake
+, fetchpatch
+, python39
+, writeScript
+, withOpus ? true
+, ldapSupport ? false
+, openldap
 }:
 
 let
@@ -28,18 +54,32 @@ let
       sha256 = "sha256-0iEr/Z4UQpWsTXYWVYzWWk7MQDOFnTQ1BBYpynGLTVQ=";
     })
   ];
-  common = {version, sha256, externals}: stdenv.mkDerivation {
+  common = { version, sha256, externals }: stdenv.mkDerivation {
     inherit version;
     pname = "asterisk"
-    + lib.optionalString ldapSupport "-ldap";
+      + lib.optionalString ldapSupport "-ldap";
 
 
-    buildInputs = [ jansson libedit libxml2 libxslt ncurses openssl sqlite
-                    dmidecode libuuid newt
-                    lua speex
-                    srtp wget curl iksemel ]
-                  ++ lib.optionals withOpus [ libopus opusfile libogg ]
-                  ++ lib.optionals ldapSupport [ openldap ];
+    buildInputs = [
+      jansson
+      libedit
+      libxml2
+      libxslt
+      ncurses
+      openssl
+      sqlite
+      dmidecode
+      libuuid
+      newt
+      lua
+      speex
+      srtp
+      wget
+      curl
+      iksemel
+    ]
+    ++ lib.optionals withOpus [ libopus opusfile libogg ]
+    ++ lib.optionals ldapSupport [ openldap ];
     nativeBuildInputs = [ util-linux pkg-config autoconf libtool automake ];
 
     patches = [
@@ -139,13 +179,15 @@ let
   };
 
   # auto-generated by update.py
-  versions = lib.mapAttrs (_: {version, sha256}: common {
-    inherit version sha256;
-    externals = {
-      "externals_cache/pjproject-2.12.1.tar.bz2" = pjproject_2_12_1;
-      "addons/mp3" = mp3-202;
-    };
-  }) (lib.importJSON ./versions.json);
+  versions = lib.mapAttrs
+    (_: { version, sha256 }: common {
+      inherit version sha256;
+      externals = {
+        "externals_cache/pjproject-2.12.1.tar.bz2" = pjproject_2_12_1;
+        "addons/mp3" = mp3-202;
+      };
+    })
+    (lib.importJSON ./versions.json);
 
   updateScript_python = python39.withPackages (p: with p; [ packaging beautifulsoup4 requests ]);
   updateScript = writeScript "asterisk-update" ''
@@ -153,7 +195,8 @@ let
     exec ${updateScript_python}/bin/python ${toString ./update.py}
   '';
 
-in {
+in
+{
   # Supported releases (as of 2022-04-05).
   # Source: https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions
   # Exact version can be found at https://www.asterisk.org/downloads/asterisk/all-asterisk-versions/
@@ -166,7 +209,7 @@ in {
   asterisk-lts = versions.asterisk_18;
   asterisk-stable = versions.asterisk_19;
   asterisk = versions.asterisk_19.overrideAttrs (o: {
-    passthru = (o.passthru or {}) // { inherit updateScript; };
+    passthru = (o.passthru or { }) // { inherit updateScript; };
   });
 
 } // versions