diff --git a/profiles/base/.local/bin/check_ip b/profiles/base/.local/bin/check_ip
index 7546645..e6c5a25 100755
--- a/profiles/base/.local/bin/check_ip
+++ b/profiles/base/.local/bin/check_ip
@@ -1,13 +1,14 @@
-#!/usr/bin/env bash
+#!/bin/bash
 
-readonly SCRIPT_NAME=${0##*/}
+SCRIPT_NAME="${0##*/}"
+readonly SCRIPT_NAME
 
 check_deps() {
-    command -v curl >/dev/null 2>&1 || die "curl: command not found"
+  command -v curl >/dev/null 2>&1 || die "curl: command not found"
 }
 
 usage() {
-    cat <<EOF
+  cat <<EOF
 Usage: ${SCRIPT_NAME} [--family auto|4|6] [-h|--help]
 
 Query an external service using curl and print:
@@ -22,60 +23,66 @@ EOF
 }
 
 shell_quote() {
-    local -r string=$1
-    printf "'%s'" "${string//'/'\\''}"
+  local -r string="$1"
+  printf "'%s'" "${string//'/'\\''/}"
 }
 
 die() {
-    local -r message=$1
-    printf "%s: %b\n" "${SCRIPT_NAME}" "${message}" >&2
-    exit 1
+  local -r message="$1"
+  printf "%s: %b\n" "${SCRIPT_NAME}" "${message}" >&2
+  exit 1
 }
 
 invalid_option() {
-    local -r option=$1
-    die "invalid option $(shell_quote "${option}")\nTry '${SCRIPT_NAME} --help' for usage."
+  local -r option="$1"
+  die "invalid option $(shell_quote "${option}")
+Try '${SCRIPT_NAME} --help' for usage."
 }
 
 parse_args() {
-    family="auto"
-    while (( $# > 0 )); do
-        case "$1" in
-            -h|--help) usage; exit 0 ;;
-            --family)
-                ( (( $# < 2 )) || [[ -z "$2" ]] ) && die "--family requires an argument (auto, 4 or 6)"
-                family=$2
-                shift 2
-                ;;
-            --family=*)
-                family=${1#*=}
-                [[ -z "${family}" ]] && die "--family requires an argument (auto, 4 or 6)"
-                shift
-                ;;
-            *) invalid_option "$1" ;;
-        esac
-    done
-    validate_args
+  family="auto"
+  while (($# > 0)); do
+    case "$1" in
+    -h | --help)
+      usage
+      exit 0
+      ;;
+    --family)
+      ( (($# < 2)) || [[ -z "$2" ]]) &&
+        die "--family requires an argument (auto, 4 or 6)"
+      family="$2"
+      shift 2
+      ;;
+    --family=*)
+      family="${1#*=}"
+      [[ -z "${family}" ]] &&
+        die "--family requires an argument (auto, 4 or 6)"
+      shift
+      ;;
+    *) invalid_option "$1" ;;
+    esac
+  done
+  validate_args
 }
 
 validate_args() {
-    case ${family} in
-        auto|4|6) ;;
-        *) die "invalid value for family: '${family}' (expected auto, 4 or 6)"
-    esac
+  case "${family}" in
+  auto | 4 | 6) ;;
+  *) die "invalid value for family: '${family}' (expected auto, 4 or 6)" ;;
+  esac
 }
 
 show_ip() {
-    local -a curl_args=()
-    [[ ${family} == "4" ]] && curl_args=("-4")
-    [[ ${family} == "6" ]] && curl_args=("-6")
-    curl "${curl_args[@]}" zx2c4.com/ip
+  local -a curl_args=()
+  [[ ${family} == "4" ]] && curl_args=("-4")
+  [[ ${family} == "6" ]] && curl_args=("-6")
+  curl "${curl_args[@]}" zx2c4.com/ip
 }
 
 main() {
-    check_deps
-    parse_args "$@"
-    show_ip
+  check_deps
+  parse_args "$@"
+  show_ip
 }
 
 main "$@"